MAZDA Car Fault Codes DTC - CX-5, CX-7, 3, 5, 6, 323, 626, RX-8, Demio, Familia, Bongo Friendee, MPV, Tribute, Premacy, Xedos.
P0093 A serious leak in the fuel system, possible causes of the problem:
failure or incorrect data coming from the fuel pressure controller;
mechanical failure of the system, lack of tightness;
damage to wires or cable connector.
To identify the problem should:
- check all of these items;
- make sure that the fuel is drained into the return line;
- check for possible fuel leaks, as well as the fuel pump (it may be clogged).
P1000 This DTC indicates that OBD2 Diagnostic Interface Testing has not been completed. If the problem is due to user actions (starting the engine, turning off the program or the diagnostic scanner), then the testing process must be repeated. Otherwise, verification of the software component of the control unit is required.
MAZDA Exhaust system DTC
P0401 Low efficiency recorded during the operation of the exhaust gas recirculation system. If error P0401 occurs, it is necessary to test the operation of the control module, as well as the integrity of all lines for wear and leakage as a result of mechanical damage.
P1402 Malfunctions in the exhaust gas recirculation system. The on-board computer reports a clogged orifice plate. The problem should be sought in the calibration hole.
P1403 The control unit reports an incorrect connection of the pipes and lines of the exhaust gas recirculation system. Because of this, the readings from the main sensor do not correspond to the normalized parameters.
P1405 Also an error related to the operation of the exhaust gas recirculation system. The on-board computer reports that the gas inlet hose to the inlet to the valve is clogged or missing, i.e. disconnected. It is necessary to check the integrity of the pipe and make sure that the clamp is tightened properly.
MAZDA Fuel vapor control system errors
P0440 The on-board computer detected a malfunction in the control system for the capture of fuel vapor. The type of problem is not specified, therefore, it is necessary to check all the components of the system in turn.
P0441 The control unit has registered a low-quality purge of the vapor recovery system
P0442 Minor system leak. It is required to check all highways, as well as their connection points for leaks. The reason may be the weakening of the clamps on the nozzles.
P0443 Code P0443 (0443) appears when there is a malfunction in the operation of the control line of the purge valve for the vapor recovery system
P0444 On-board computer detected a malfunction in the purge valve. The device is jammed in the open position.
P0446 Malfunctions in the operation of the air valve control mechanism of the vapor recovery system
P0450 Malfunctions in the operation of the fuel vapor pressure controller
P0451 The pulse received by the on-board computer from the system sensor is outside the range of acceptable characteristics
P0454 An intermittent signal that does not match the permissible parameters is supplied from the fuel vapor pressure regulator
P0455 A serious leak has been detected in the fuel vapor recovery system, which may be due to mechanical damage.
MAZDA Engine malfunctions
P0011 Code P0011 reports on the wrong position of the camshaft, to eliminate the problem the following actions are performed:
Perform electrical diagnostics of the phase controller. The user must ensure that there is no trace of oxidation on the contact elements, as well as the integrity of the wires.
Visually check the phase controller. On the case of the device there should not be traces of cracks and pollution by soot. Such problems usually occur with untimely replacement of motor fluid.
Diagnose the VVT valve timing with a multimeter set to an ohmmeter operating mode. It is necessary to check the resistance level, which should be about 6.5-7.5 ohms. You should also apply a 12-volt voltage to the valve when the controller is dismantled to make sure the rod moves.
Perform a visual inspection of the camshaft for defects.
P0012 Error P0012 (0012) on Mazda CX, GF. 323F and other versions literally stands for “camshaft desync”.
Elements that need to be checked in order to eliminate the error on cars 1999, 2005, 2008 and other years of release:
- camshafts for integrity;
- crankshaft for possible damage to the pulley;
- OCV valve operation;
- the camshaft controller (you need to make sure the sensors are working, check their contacts, and also ring the wiring).
P0101 Increased signal from the mass air flow controller, possible causes:
errors in the formation of the air-fuel mixture;
malfunction of one of the components of the ignition system;
failure of high voltage wires;
clogged flow meter.
P0171 Code P0171 appears when lean (“poor”) air-fuel mixture. The cause of the problem may be air leaks.
P0172 The control unit recorded the re-enrichment of the air-fuel mixture in the cylinders of the power unit.
Possible reasons why this error might appear:
- Clogged air filter device. This item needs to be replaced to address the cause.
- Malfunction of the fuel pump, which creates too high a pressure level in the fuel system. The fuel pressure sensor may not work. Injector malfunction. To diagnose these components, a test with a stand will be required.
- Malfunctions in the operation of air pressure and mass air flow controllers.
If the mixture is really re-enriched and this error is not accidental, then the problem will manifest itself with the following symptoms:
- the appearance of the sound of detonation in the exhaust pipe and deformation of the muffler, the breakdown of the catalyst device is possible;
- the formation of oil sludge on the exhaust pipe, which appeared as a result of unburned fuel;
- the appearance of black smoke from the muffler;
- a decrease in driving dynamics, the appearance of failures when operating at higher or lower speeds.
P0300 Code P0300 appears in case of accidental or multiple misfires in the operation of the ignition system when igniting a combustible mixture. Diagnostics of all components of the node is required, starting from the candles and ending with the control unit.
P0301 Misfire recorded in the first cylinder of the engine.
Possible causes of the problem:
- mechanical failure in the operation of the power unit, it is necessary to test the compression level of the cylinders;
- damage to candles, the formation of soot on them, failure of elements;
- high voltage cables are faulty;
- failure or malfunction of the ignition coils;
- nozzle malfunctions;
- air leaks;
- problems in the operation of the microprocessor device.
P0302 Error code P0302 appears when misfires are detected in the second engine cylinder
P0303 Error codes P0303 or 0303 appear with misfire registered in the third cylinder of the power unit
P0304 The on-board computer indicates the misfire recorded in the fourth engine cylinder
P0420 Codes P0420 or 0420 are associated with low efficiency of the functioning of the catalyst system B1
P1512 Problem in the intake manifold control system. An error indicates sticking of the first bank in the closed position.
P1518 Failure in the operation of the solenoid valve of the intake manifold assembly geometry measurement system. The problem is fixed in the first bank of the power unit, the valve freezes in the open position. The mechanical malfunction of the device is eliminated by replacing the regulator.
P1195 Solenoid malfunction, visual inspection of the device is required. This problem does not affect the operation of the engine, but may report excess air leaks.
P1522 Malfunction of the VRIS solenoids. The user needs to test the functioning of two valves located behind the intake manifold. The tubes should also be checked for integrity and lack of tightness.
P2004 The on-board computer reports that the intake flaps located in the first row of cylinders do not close. It is recommended to test the operation of the device position controller.
P2006 Code P2006 appears when the throttle vortex valve malfunctions, this device is under the bypass regulator. The element may stick in the closed or open positions as a result of a malfunction of the spring element.
P2088 Combinations of P2088 or 2088 are associated with a malfunction in the drive unit A of the valve timing system. The engine control unit receives too low a signal. The user needs to diagnose the valve timing, if necessary, the device is cleaned with a carbocliner. If the vehicle’s mileage is more than 150 thousand km, it is possible to stretch the timing chain. If it is seriously worn, it must be replaced.
P2096 The combination of P2096 (2096) on the Mazda CX7 and other versions is associated with the receipt of information on the depletion of the air-fuel mixture to the control unit. Data is supplied from oxygen controllers installed after the catalyst device. This code indicates that a lack of fuel and an excess of oxygen are recorded in the exhaust gases.
Possible causes of the problem:
- the appearance of cracks and other mechanical damage in the exhaust manifold;
- damage or wear to gaskets or o-rings;
- nozzle contamination or failure;
- failure or malfunctioning of the fuel pumps;
- fuel pressure sensor breakdown;
- clogged filter elements.
P2101 Malfunction of the throttle. This problem can affect the quality of the power unit and the formation of the air-fuel mixture. It is necessary to check the assembly and verify the integrity of the actuator control circuit.
P2177 Error code indicates the depletion of the air-fuel mixture.
If the problem is not the idle speed sensor, then the causes of the malfunction will be as follows:
- failure or clogging of the flow meter;
- a malfunction in the EGR valve (the device is designed to return a certain amount of exhaust gas to the cylinder);
- malfunctions of the intake system or throttle assembly position controller;
- breakdown or malfunction of the absolute pressure controller located in the intake manifold (the device is designed to determine the density of the air flow and the formation of a combustible mixture);
- incorrect marking on the shafts of the gas distribution system;
- malfunction of the oxygen controller;
- clogged or damaged nozzles;
- fuel pump breakdown, incorrect ramp pressure, lack of tightness.
If the error is not accidental, then it is accompanied by the following symptoms:
- difficulty starting the engine;
- at the beginning of the movement, the power unit stalls;
- the motor operates at idle, the latter float and arbitrarily increase up or down;
- low power ICE;
- when you press the gas, the engine practically does not respond;
- tremors while driving.
P2178 Code 2178 is the result of an error in the system for adjusting the composition of the air-fuel mixture. It is necessary to check the operation of all sensors, including oxygen and mass air flow controllers.
P2187 Error code P2187 indicates the depletion of the air-fuel mixture. Such a problem is accompanied by a decrease in engine power and a deterioration in vehicle dynamics during movement.
P2188 The on-board computer recorded the re-enriched mixture in the cylinders of the power unit. The user needs to check the filter element for clogging, as well as the performance of the nozzles. To check the latter, it is better to contact specialists so that diagnostics are performed using a special stand. Also, the cause may be a malfunction or clogging of the flowmeter. To clean the sensor, you will need a special tool.
P2263 Low efficiency of the turbocharger system or supercharger compressor system. With such an error, first of all, it is necessary to verify the tightness of the vacuum component of the turbine control drive. In addition, the so-called blades can jam on the unit. Sometimes the cause of the problem is a clogged air filter device or a breakdown in the boost pressure controller.
MAZDA Errors in the operation of sensors
B0003 Failure of the third front airbag igniter installed on the driver's side. The fact is that the driver’s airbag is equipped with only one squib, so the problem is a consequence of a software malfunction of the passive safety control unit. It is necessary to test the module and flush it if necessary.
B2227 Malfunction of the front airbag controller. The sensor element must be replaced or repaired, including wiring diagnostics. With this error, the airbag indicator lights up on the dashboard.
B2278 Malfunction of the steering wheel torque controller
B2296 Malfunctions in the collision controller mounted on the side of the body. Diagnostics of the airbag igniter and connection of the sensor itself is required.
C200D Steering angle motor angle controller malfunction. If the sensor is operable and its wiring is intact, then you need to check the functioning of the electric motor. The contact on the device’s connection connector may have slipped.
C0044 Error C0044 is a consequence of the inoperability of the brake pressure controller A. It is necessary to check the sensor and its connection.
C0051 A malfunction or complete failure of the steering angle controller. It is necessary to check the sensor itself, as well as its connection line.
C1165 Malfunction of one of the ABS sensors located on the wheels. If the controllers themselves are operational, then the cause of the problem must be sought in the wiring. The malfunction often manifests itself in rainy and damp weather when moisture enters the device connection jack.
C1277 Code C1277 appears in conjunction with the directional stability indicator on the dashboard. It is necessary to check the operation of the steering angle sensor.
C1306 Literally translate the code C1306 as follows: "it is impossible to establish a neutral position of the steering angle by the signals received from controllers mounted on wheels." It is necessary to test the operation of steering wheel adjustments, as well as ABS. The problem may be a malfunction or damage to the wiring of the integrated sensor.
P0031 Malfunction in the heating mechanism of the heated lambda probe marked 1. The control unit notes that the problem may be in the undervoltage detected in the circuit. If error P0031 (0031), it is necessary to test the integrity of the wires, the sensor and the motor control unit. Possible cable short to ground.
P0126 Thermostat malfunction, possible poor contact with the car mains. With such a problem, the engine is disrupted, the power unit overheats, the Check Engine icon appears on the dashboard.
P0128 On Mazda BT and other models, this code indicates a malfunction of the coolant controller (thermostat). The on-board computer notes that for a given time the operating temperature of the power unit is not reached, which indicates a low efficiency of the cooling system.
Possible causes of the problem:
- Failure of the thermostat. The device may not open, jam or open prematurely.
- Malfunctioning refrigerant temperature controller. If the sensor is operable, it is necessary to test the wiring of the regulator.
- Reduced level of consumables caused by leakage. The user needs to check all components of the cooling system for integrity and repair damaged elements. Often the cause of the leak is the weakening of the clamps on the highways.
P0130 Failure of the first oxygen controller located in the engine bank 1
P0133 Malfunction of the oxygen controller 1 located in the first bank of the engine. The on-board computer notes that the impulse to enrich or deplete the mixture arrives at the control module late, which may affect the operation of the power unit as a whole.
P0135 Malfunction in the first oxygen sensor or its heating element, the second option is more likely. It is necessary to test the device located in the first bank of the engine.
P0234 The control unit reports an increased boost pressure level fixed at the inlet. The malfunction consists in the operation of the sensor or the impossibility of its determination. If the device and its wiring are intact, then the microprocessor module is subject to diagnosis.
P0340 Code P0340 appears when the camshaft position controller fails. The sensor is defective and must be replaced if there is no signal.
P0341 Code P0341 or 0341 also indicates problems with the camshaft controller. The readings or impulse recorded on the control line of the device does not correspond to the normalized parameters. The problem may be deterioration or damage to the cable insulation layer due to kinks, resulting in a reduction in voltage.
P0335 Malfunction of the crankshaft position controller marked “A”. If the sensor is operable, it is necessary to check its connection and verify the integrity of the wiring. Sometimes the appearance of such an error is associated with damage to the teeth on the crankshaft.
P0404 Exhaust Gas Recirculation (EGR) Sensor Replacement Required. The pulse coming from the controller is outside the range of acceptable parameters. If the regulator itself is operable, then the user needs to verify the integrity of the wiring and the quality of the connection.
P0421 Error codes P0421 or 0421 are associated with incorrect operation of the oxygen regulator, to correct the problem, check:
- lambda probe 1 and 2;
- oxygen sensor heating elements;
- wiring and contacts on the cable block;
- exhaust system for depressurization and breakthrough;
- catalyst unit.
P0500 Faulty controller that fixes the speed of the vehicle. The cause of the problem can be both in the sensor itself and in the wiring. Also, the problem may lie in the control unit.
P0505 Malfunction or complete failure of the idle speed sensor
P0506 The idle speed sensor does not work correctly, since the speed of the power unit is much lower than normal
P0507 Increased speed recorded in the idle controller
P0660 Malfunction in the solenoid valve of the system of changing the geometry of the intake manifold.
Possible causes of problem P0660:
- short circuit to “plus” or “ground” or open circuit between the contacts of the valve B and the output 19 on the control unit;
- cable damage between terminal A of the valve and terminal D of the main relay;
- oxidation of contacts on connectors or damage to pins;
- malfunction of the control module.
P0661 Combinations of P0661 or 0661 indicate a malfunction in the solenoid valve or problems associated with its wiring. If the device itself is operational, then you need to test the integrity of its wiring and contact elements.
P1228 Error 1228 indicates a malfunction or malfunction of the vacuum controller. It is necessary to check the sensor, first of all, the battery discharge regulator. You should also make sure that there are no software malfunctions in the operation of the control unit, if after fixing the problem the error remains.
P1345 Code P1345 appears when there is a communication failure or malfunction in the camshaft position controller. First of all, you need to make sure that the sensor is installed properly, because as a result of prolonged use of the car and exposure to vibrations, the connector with the contact from the controller could move away. The cause may be oxidation or clogging of the sensor socket.
P2195 Failure of the first oxygen controller located in a row of 1 cylinders
P2251 Code 2251 is formed when the front lambda probe malfunctions with marking 1, the main causes of the malfunction:
- poor contact of the device with the wiring, cable breakage or short circuit of the contact elements to ground;
- violation of the integrity of the controller design;
- regular use of low-quality fuel;
- controller overheating due to improperly configured ignition or re-enriched air-fuel mixture;
- frequent attempts to start the engine, which cause the penetration of the air-fuel mixture into the exhaust system;
- the use of a sealant that is not designed to work at high temperatures, for fixing the device (referring to silicone lubricants);
- ingress of engine fluid into the exhaust system as a result of wear on the oil scraper rings or caps.
MAZDA Wiring faults
B00D5 Electrical malfunction of passenger identification system
B1231 Error code associated with the operation of the passive safety system. First of all, it is recommended to check the wiring connected to the sensor under the right seat.
B1261 The combination B1261 appears when there is a short to ground on the power line of the solar heating controller. There may be a malfunction in the electronic automatic adjustment module of this parameter.
B1294 Malfunction in the side airbag installed on the driver's side. The control unit reports an increased resistance recorded on the control line. The user needs to parse the steering column and ring the loop.
B1317 Undervoltage supply to instrument cluster control line. It is necessary to check all the connectors connected to the control panel. The cause of the problem may be a malfunction or oxidation of one of the contact elements.
B1318 The microprocessor module informs the user of a critically low voltage level recorded in the vehicle electrical network. First, you should check the operating parameter with a multimeter on a car with the power unit turned off and the engine turned on. The voltage level should be 11.8-12.8 and 13.4-14.5 volts, respectively. The cause of the malfunction may be the battery or generator set.
B1322 Control module has detected a short circuit in the open circuit of the driver's door
B1877 Too high resistance recorded by the control module on the pretensioner line of the driver's safety strap. If the problem is wiring, then repair the damaged area and change the cable. Diagnostics of the sensor itself is also performed. The control module may be faulty with a passive safety system.
B1878 Short circuit to the battery in the power line of the tensioner of the driver's safety strap.
Possible causes of the problem:
- damage to the wiring, open circuit or short circuit;
- tensioning device on the driver's side must be replaced;
- malfunction of the control module of the passive safety system.
B1884 Error in the control airbag control line Airbag or warning control indicator. A possible problem may be a poor contact of the LED located on the instrument panel.
V1913 The on-board computer registered a short circuit to ground on the control line of igniter device No. 1.
It is necessary to check the details on the driver and front passenger side, as well as the following elements:
- spiral cable;
- control module passive safety system;
- power cable.
B1932 Rupture or damage to the driver side airbag electrical circuit
B1994 Damage to the power line of the passive safety warning lamp. To find the cause, the wiring is checked, as well as the sensors to which the Airbag cushions are connected. The problem may be due to malfunctions in the operation of the squib.
B1998 The verbatim transcript of this code is “a break in the side passenger side airbag power line.” In fact, this error may be due to disconnection or poor-quality contact of the cable with the sensor located under the front seat. The shoe connected to the controller must be yellow and marked “Airbag”.
B2212 The switching device in the dashboard lighting system does not work or it receives an incorrect signal. It is necessary to check the operation of the control module of the instrument cluster.
B2232 Defective operation of the warning light or driver for the passive safety system. In some cases, the problem occurs as a result of a short circuit in the power line of one of the pillow sensors.
B2479 Open or damaged power line of the parking brake activation sensor. When you press the appropriate pedal brake lights will not light up.
C0020 Malfunction in the control system of the electric motor of the pump of the anti-lock unit, the problem may be a jam in the actuator. The problem must be sought in the elements of the ABS, from sensors with a control unit to wiring and contacts.
C1118 Torque reduction request pulse line error
C1119 Communication error with the information module, the control unit cannot determine the device due to wiring damage or short circuit. The cause of the problem should be sought in the connection of the components, as well as the control device of the dashboard. The control panel may not display some icons or display incorrect data.
C1141 Malfunctions in the rotor mechanism of the anti-lock sensor system, the problem must be sought in the short circuit of the sensor.
C1145 Signal transmission error or incorrect pulse recorded on the control line of the front right wheel speed controller
C1175 Code indicates a break or damage to the power line of the rear left wheel speed controller. The problem may lie in the sensor itself, its connection cable or connector. If all these elements are integer, then the user needs to check the operation of the control unit.
C1233 Incorrect pulse from wheel speed controller. The on-board computer (BK) reports that the anti-lock system therefore does not function for more than 60 seconds. A wiring check is required with the controller itself. The cause of the problem may be a malfunction of the ABS control unit.
C1278 Malfunctions in the ESP system. It is necessary to check the wiring and functionality of the main module.
C1954 Damage or defect recorded on the supply and control line of the pressure controller installed in the first cylinder
P0A8D Malfunctioning power management system.
Possible causes of the problem:
- discharge of the battery as a result of damage to the housing, boiling or leakage of electrolyte, natural wear is also possible;
- malfunction of the generator device (breakdown of the regulator relay, wear of the brushes, etc.);
- damage to the wiring connected to the battery or generator;
- oxidation of contacts on the battery terminal;
- malfunction of the control module.
P0001 Open control circuit of the fuel supply sensor. The problem usually manifests itself in diesel powertrains. With such a problem, the power of the power unit is significantly reduced, and also the engine may not start at all.
P0102 The on-board computer has detected a reduced output pulse level of the mass air flow controller. If everything is in order with the wiring and contacts, then you need to test the operation of the sensor and make sure that it is working. The problem may be a clogging of the device; cleaning using a special tool will allow to eliminate such a malfunction.
P0106 Code P0106 (0106) on cars 626 GE, GD, 6 GH and other versions indicates an increased pulse on the control line of the air pressure controller. The signal does not match the normalized parameters.
P0108 Error code P0108 appears as a result of an excessively high pulse that does not correspond to the factory values recorded on the supply line of the air pressure controller
P0113 Code P0113 appears when an increased pulse is recorded on the line of the intake air temperature controller. A detailed wiring check is required.
P0122 The on-board computer registered a low signal level of the output controller of the position of the throttle valve
P0123 Code P0123 reports that the on-board computer has detected a critically high pulse on the output line of the throttle position controller A
P0192 Critically low pulse level detected on the power and control lines of the fuel rail pressure controller
P0216 Damage or defect on the power line and injection time control control, with such an error, the engine may malfunction.
P0325 Error code 0325 appears when the power line of the first knock sensor is damaged, if the device is really malfunctioning, this is fraught with the following symptoms:
the appearance of the Check indicator on the control combination;
increase in fuel consumption, regardless of the operating mode of the engine and gearbox;
reduced power of the power unit, in particular, when driving uphill;
when operating under high loads, the engine detonation time increases, a metal knock is heard from under the hood.
P0328 Code P0328 (0328) for cars 2003, 2004, 2008 and other years of production appears when a critically high signal is detected on the knock sensor line. If this error appears on the panel, the user needs to diagnose the controller located in the first engine block. The problem most likely is the damage or shorting of the contacts on the line.
P0351 On cars 97g and other years of production, this code indicates damage to the primary or secondary power line of the ignition coil “A”
P0354 Failures in the operation of the primary or secondary control line of the ignition coil D. It is necessary to check the integrity of the wire going to the device from the distributor, the contact may be damaged. Sometimes high-voltage cables are bent, which leads to signal degradation.
P0480 Damage or short circuit detected by the microprocessor module on the wiring connected to the fan relay. This refers to a device designed to cool the power unit. If the fan is faulty, this could result in overheating of the engine.
P0571 Damage or break in the power line of the cruise control system. The cause of the problem may be a malfunction of the brake switch A.
P0720 Damage or defect in the power line of the output speed controller
P0850 Input circuit of the parking sensor or the neutral switch of the device.
The following components of the parking system are subject to diagnosis:
- sensors installed in the front or rear bumpers of the car;
- electrical circuits supplying these controllers;
- wiring connectors and sensor elements (the latter could become clogged);
- parking radar control unit;
- information board in the cabin, as well as connecting to it.
P1170 Error code P1170 or 1170 appears when the control line and power supply to the oxygen controller installed in the front row of the engine are damaged. The user must check the operation of the sensor with bank 1.
P1173 On-board computer detected a malfunction in the control line of the H2OS controller. The error is fixed and is not random, so there is no reason to reset it. It is necessary to check the integrity of the cable connected to the first controller installed in the second row of the engine.
P1250 Code P1250 appears when an incorrect reading is received from the fuel pressure controller of the control solenoid valve. The device itself is located at the bottom of the fuel rail.
To diagnose the valve, the following actions are performed:
- Disconnect the cable block from the device.
- Check the quality of the connection, make sure that there are no line breaks and kinks in the area of the block.
- Apply 12-volt voltage to the valve. The device at this moment should click and block the course. The air flow as a result will pass through the fitting.
P1391 Short to ground in the power circuit of the first glow plug located in bank 1.
P1401 Problems in the operation of the exhaust gas recirculation pressure controller associated with an electrical circuit. The control unit detects an increased input pulse. The user needs to test the wiring and the EGR controller itself.
P1408 Error message from the exhaust gas recirculation system control unit. It is noted that the flow rate of the latter goes beyond the permissible parameters. The user needs to test the functionality of the wiring, valves and contacts.
P1451 Code 1451 is associated with a malfunction in the ventilation line of the ventilation system
P1504 Code 1504 appears when the wiring connected to the idle speed sensor is damaged or broken
P1515 General DTC indicating a short circuit It is recommended to check all conductors connected to the control module.
P1520 Code 1520 is related to a malfunction of the intake manifold control line
P1521 Malfunction in the electrical circuit of the intake control system with variable resonance. It is necessary to check the wiring and connection of the control module.
P1536 Malfunction in the hand brake indicator switch. The control unit reports damage to the power supply line of the device. If the cable is intact, then the cause must be sought in the switch itself.
P1631 Error code P1631 is associated with incorrect output voltage signals of the generator device.
Unit elements that are recommended to be checked first of all, if its wiring and battery are operational:
- drive pulley, wear or mechanical damage is possible;
- current collection brushes;
- collector device (slip rings);
- voltage regulator;
- stator winding (possible short circuit of turns);
- bearing device (destruction or wear);
- rectifier assembly or diode bridge;
- wiring charging circuit.
P2008 Open power supply and intake manifold control
P2009 Reduced pulse level, not in accordance with standardized indicators, recorded in the power circuit of the electromagnetic control valve of the air mixing system. To find the cause of P2009 (2009) malfunction, it is necessary to determine the resistance value on the device contacts. If this parameter is 0 Ω, the valve must be replaced.
P2503 Low charge current in vehicle electrical system. It is necessary to check the battery operation (on a car with the engine running, the voltage should be about 13.7 V with the electric equipment turned on). You should also make sure that the generator set is working and that it is connected correctly.
P3302 Short to ground in the camshaft sensor control line. It is necessary to fully test the wiring, check the voltage and resistance on the connection contacts. A sensor located in the second row of cylinders is also subject to diagnostics.
U0114 Combination U 0114 appears when communication with the all-wheel drive system is lost
U0121 If this code appears on Mazda CX, 6 MPS, 323 BG or another version, this indicates a lack of communication with the ABS module. When this error appears on the dashboard, the anti-lock system indicator lights up. The malfunction is caused by damage to the power line or malfunction of the contacts on the connector, which are associated with oxidation or clogging.
MAZDA Lambda probe faults
P0030 Damage to the control line of the heating element of the oxygen controller. With this error, the user needs to check the power cable and the heater itself.
P0037 By error P0037 (0037), the control unit reports a reduced voltage registered on the power and control lines of the lambda probe heating device. It is necessary to test the operation of the sensor 2 located in the first bank.
Possible causes of this problem:
- failure or malfunction of the heating element;
- damage or burnout of the safety device of the oxygen regulator;
- damage to the wiring or a break in the power line;
- oxidation or mechanical failure of contacts on the connection block;
- malfunctions or a complete malfunction of the ECM motor control unit.
P0038 The on-board computer detects too high a voltage on the control circuit of the heating component of the oxygen sensor. It is necessary to diagnose the controller located in the first engine bank (regulator No. 2). With such a problem, the first thing to do is to test the sensor itself and the device fuse. The problem may also be due to incorrect readings of the control unit.
P0131 The pulse level is too low, fixed on the control line of the first lambda probe. The user needs to diagnose the operation of the device located in the first engine bank.
P0134 Lack of activity of the output pulse of the oxygen controller 1. If error P0134 (0134), a detailed diagnosis of the device located in the first engine bank is required.
P0138 Error code P0138 is associated with an increased level of the output pulse fixed on the line of the oxygen controller 2 installed in the first bank
P0140 The control unit detects the lack of activity of the output pulse of the second oxygen regulator. A detailed diagnosis is subject to the device under marking 2 installed in the first motor bank. Problem P0140 (0140) most likely is wiring.
MAZDA Problems in the operation of electronic devices, control units
B13D3 Code indicates a malfunction in the PATS transmitter. The control unit notes that this error is associated with a low voltage in the circuit. The problem should be sought in the relay of the start and stop system of the power unit, in practice it is associated with the operation of the electronic key and the immobilizer unit. The reason may be the discharge of the battery located in the key.
B2BCD Malfunction of the control module by the passive safety system. Most likely, the contact has gone somewhere, you need to check all the sensors and the unit itself.
B0010 General code indicating problems in the operation of the passive safety system, the possible causes are as follows:
battery discharge due to wear or mechanical damage to the case;
poor connection of the generator set or failure of one of its components (voltage regulator relay, brushes, stator, rotor, etc.);
lack of contact or damage to the cable in the passive safety system - pretensioners, sensors, igniter, Airbag control module;
malfunction of the engine control unit or passive safety, a software failure is possible.
B1013 Literally, this code translates to “Passenger Identification System Calibration Error”. The problem must be sought in the operation of the SRS passive safety control unit, as well as its sensors and wiring connected to the squibs.
B1126 Malfunction in the deployment management system of the side airbag located on the driver's side. The control unit notes that the problem is the resistance being too high, fixed on the line. It is necessary to check the contacts on the sensor under the driver's seat. The problem also often is the malfunction of the pillow control module.
B1127 Also an error related to the operation of the passive safety system. Checking the sensor connectors under the seats and the SRS control unit is required.
B1193 Verbatim decryption of the code - “The collision data memory is full and locked.” It is necessary to test the operation of the engine control unit and the passive safety system.
B1320 Driver door driver malfunction The problem usually manifests itself on a car with an alarm, if the door was opened with the key when the security mode is on. It is necessary to reset the memory of the control unit and check the error again, usually a floating trouble code. The combination should disappear when you re-arm the car and turn off this mode using the key fob.
B1342 DTC, indicating an electronic malfunction of the electric power steering system. First of all, it is necessary to check the operation of the pumping device for the absence of failures and proper communication.
B1352 (9352) Malfunction in the ignition key or lock circuit, in such a case the following symptoms should appear:
- failure of the starter mechanism, but the control and retractor relays must work, a signal is supplied to these elements;
- a malfunction in the work of several voltage consumers, not connected to each other, which usually - operate in the same key position;
- partial restoration of the operability of electrical equipment when changing the position of the control element within the same position.
The problem itself is unlikely to be the key, but if it is precisely in it, then battery replacement will be required to fix it. If there are signs of damage on the control element, then the key will have to be replaced with a new one.
If the reason is the ignition, then most likely you will have to change the contact group of the device:
The battery is turned off, the lock is dismantled and disassembled. The user must first remove the protective plastic pads. The wires must be disconnected from the lock, while you must be careful so as not to damage them.
Failed device components are replaced with new ones.
A new contact group is being connected. Then you need to install the lock back and connect its power wires.
B1600 The on-board computer reports that the ignition key transponder signal has not been received by the immobilizer control module. A possible cause of the problem may be a malfunction of the Immo antenna adapter, as well as a discharge of the battery in the key.
B1681 The immobilizer control unit cannot receive a signal from a PATS transmitter, i.e. an electronic key. The user needs to check the operation of the control and make sure that the battery located in it is working. The problem may be a disconnection of the control module or poor contact with the wiring of the antenna adapter. If an abnormal anti-theft system was recently installed, then the user also needs to make sure that there is no conflict between the standard immo and the alarm control unit.
B1871 Malfunction of the passive safety control module. An error may indicate a problem with the front passenger presence sensor.
P0604 Error in the internal RAM (random access memory). The problem may be software problems, as well as the memory module itself. Perhaps his contact has moved away from the control unit board or the circuit has blown. Also, the problem may be the effect of moisture on the device.
P0605 Internal malfunction of the memory control module for reading fault information
P0606 Microprocessor device malfunction, possible causes of the problem:
- Damage to the device as a result of voltage overload or short circuit on the control and power lines. - Such a problem may be due to overheating of the equipment, the effects of corrosion, shaking, vibration and shock.
Failure due to constant exposure to moisture. If water affects the control module for a long time, this will cause mold to form on its inner formation. If the problem is not critical, you can disassemble the unit and try to dry it by putting the circuit in a warm place.
Software malfunction. Only a flashing of the device will allow to fix such a problem. If this does not help, then the user will have to completely change the control module.
P0706 Malfunctions in the transmission performance sensor. Indications from the device are not in the range of acceptable values. This indicates a controller breakdown or a malfunction in the gearbox control unit. The malfunction may be accompanied by the transition of the transmission unit into emergency operation.
P0741 Error 0741 indicates the lack of torque converter lock-up. The problem may be that the sleeve is broken inside, as a result, a pressure leak occurs on the inclusion of the lock. It may be necessary to replace both the sleeve and the torque converter itself.
P0743 This error indicates a malfunction in the clutch of the torque converter clutch. It is necessary to test the node itself, and also make sure the integrity of the wiring that is connected to it.
P0767 Solenoid switch D stuck. A device check is required for operability, and its wiring must also be tested.
P0771 Malfunction in the gearbox solenoid E. It is necessary to test the integrity of the wiring and sensors of the transmission unit. With such an error, difficulties and jerks in shifting gears, as well as the box going into emergency operation mode, are possible.
P1200 Engine Injector Control Module Failure.
P1260 This code translates as “Theft Detected - Engine Disabled”. The problem is the immobilizer blocking the power unit. The user needs to test the operation of the standard anti-theft installation.
P1523 The combination P1523 indicates problems in the operation of the VICS automotive information and communication system. An error code appears when the wiring or control module is damaged. It is necessary to test all connectors and lines for integrity and lack of oxidation.
P1562 Malfunction or lack of communication with the PCM. First of all, it is necessary to check the operation of the 2Z block, as well as the integrity of the wiring. The cause of the P1562 problem may be a burnout of the safety element, but you also need to make sure that the mass is connected properly.
P1624 Malfunction of the engine blocking system. The power unit may not start as a result of the fact that the immobilizer control module does not detect the electronic key. It is necessary to test the battery in the device and replace it if necessary.
P1633 The on-board computer transmits a low voltage message on the CAN interface power line. If the problem is not the wiring or the battery, then you need to look for it in the generator device.
P2507 The combination of P2507 or 2507 reports a reduced voltage registered by the control unit on the line of a non-disconnectable PCM module. In addition to wiring, contacts and terminals, diagnostics of relays and safety elements are required. An error can occur when a short circuit in the sockets of the mounting block.
U0028 The on-board computer of the vehicle reports a data bus error A. It is necessary to check the wiring and the integrity of the blocks on the interface.
U0073 This error reports the inoperability of the data bus or its shutdown. It is necessary to check the wires connecting the microprocessor-based engine control module to the box unit. There may be problems in the operation of the transmission, including jerks and jerks when shifting gears, as well as the unit's transition to emergency mode. The problem may also be the discharge of the battery.
U0100 Communication error with microprocessor engine control module. Typically, this code appears when a malfunction or incorrect operation of the control unit of the electro-hydraulic system of the steering wheel amplifier or instrument cluster.
U0101 No signal or communication failure between the engine control unit and the transmission control module. It is necessary to check the wiring and contacts on the cables.
U0131 Malfunction in the electric power steering, the problem indicates a malfunction of the control module. A detailed block diagnosis is required.
U0140 Error exchanging packet data with the microprocessor control module bodywork. Perhaps one of the devices was replaced or the controllers were repaired with the battery turned on. It is necessary to check the connection of the body control module, as well as the fuse box.
U0151 On cars with a diesel or gasoline power system, this code appears when the SRS is malfunctioning. The on-board computer of the vehicle cannot determine the presence of the control module of the passive safety system as a result of the lack of a signal. It is noted that the connection was lost on the CAN bus.
U0184 Loss of communication with the radio. Usually this problem appears after installing a new car radio, if the user has not connected the antenna. It is necessary to check the quality of the connections. The problem may be the result of using an audio system with outdated software.
U0214 Malfunction in the operation of the ABS control module. It is necessary to check the operation of the device and flush it. The problem is always accompanied by the appearance of the corresponding icon on the instrument cluster.
U0401 Malfunction in the anti-lock system, the user is recommended to diagnose the ABS control module. In practice, such an error usually consists in poor contact of the valve body of the system with the mains, but damage to the wiring, as well as interference on the control and power lines, is possible.
U0423 The on-board computer recorded incorrect data received from the instrument cluster cluster. It is necessary to test the control module of the control panel and the quality of its connection.
U0452 Problems in the operation of the inter-block data exchange system. The user needs to diagnose the engine control modules and the passive safety system. Sometimes data transmission is interrupted as a result of damage to the wires.
U0483 The microprocessor module receives incorrect information from the front lighting control unit. It is necessary to test the operation of sensors of external lighting devices located under the bumpers or in the area of the wheels.
U1098 Malfunction of the cruise control system, if the unit is really inoperative, this is accompanied by the following symptoms:
- deviations from the set vehicle speed;
- the appearance of jerks, periodic accelerations and decelerations after setting the speed;
- the cruise control system does not turn off after applying the brake;
- the node is not deactivated as a result of moving the lever of the box to the “N” mode, but turns off when the brake pedal is pressed;
- the vehicle speed does not decrease and does not increase when you press the corresponding - switch located on the steering wheel;
The control light for maintaining a constant speed on the dashboard is off.
To resolve the problem, you need to pay attention to the following reasons:
- damage to the power line or malfunction of the vehicle speed controller;
- software failures in the microprocessor module;
- disconnecting the cable or damaging the line supplying the switch to the brake pedals;
- incorrect signals from the engine control unit;
- incorrect adjustment of the starter lock switch;
- damage to the start inhibit switch line;
- malfunction of the switch on the steering wheel or instrument cluster.
U1147 Malfunction in the communication line power anti-theft system. If the car is equipped with an abnormal alarm, the causes of the problem may be as follows:
- failure of limit switches located in the doors;
- malfunction of the electronic ignition key or immobilizer control unit;
- the conflict between the standard engine blocker and the control module of the anti-theft system;
- malfunctioning wiring, poor connection of the control unit or lack of contact of one of the components;
- failure or malfunction of one of the car alarm sensors - shock, volume, movement;
- software malfunction in the operation of the control unit due to damage or moisture.
U1900 No contact in the digital CAN communication system
U2011 Signal malfunction in electric power steering module operation. On Mazda BT 50, 323F BA and other models, the code may be associated with malfunctions in the operation of the control module of the system.
U2017, U2018 Communication error with the side airbag controller located on the front passenger or driver side.
Possible causes of the problem:
- malfunction of electrical circuits due to damage or breakage in the wiring;
- failure of the driver or front passenger side airbag controller;
- malfunction of the control module of the passive safety system.
U2023 This error on the Mazda RX (GC), 626 GF, Demio DW3W and other models indicates a malfunction recorded during data transmission via CAN protocol
U2064 Fault in the pulse of the request for activation of the warning light from other control modules. Malfunctions concern the control unit which belongs to the local area network CAN. It is necessary to test the operation of the wires connected to the airbags.
U2202 General equipment configuration error, usually appears after replacing one of the control units or electronic devices connected to the microprocessor. Incorrect data is coming to the control node from one of the elements. In practice, the problem usually lies with the anti-lock system module or its sensors. If necessary, flashing the unit.
U2300 Malfunction in the body control module.
If the block itself is in order, then this error may be indirect and indicate the following problems:
- wear or damage to high voltage wires;
- failure or formation of soot on spark plugs;
- ignition coils are broken or contacts on the wires of their connection are oxidized;
- fuse box, poor-quality contact or breakdown;
- microprocessor module malfunction.
U2510 Malfunction in the immobilizer, the main reasons for the operation of the motor blocker:
Turning off the battery with the ignition on. Reinstalling the module will allow fixing the problem, in particular, if the immobilizer is not tied to a key.
Low battery when starting the power pack.
Replacing the engine control unit, immobilizer or the power unit itself. It is necessary to perform the binding and flashing of devices.
Malfunction of electrical equipment and devices.
Software malfunction, firmware failure. The encoding of the blocking node is stored in the memory of the eeprom module - the memory module.
Key malfunction or poor antenna connection.
U2516 Malfunctions in the operation of the electronic component of the car, possible causes of the problem:
- malfunctions in the digital CAN bus;
- damage to the wiring, connectors, oxidation or clogging of the contact elements on one of the connectors connected to the control unit;
- mechanical failure in the operation of the control module;
- software failure or malfunction of microprocessor unit firmware;
- incorrect operation of one of the control units, in particular, it is necessary to check the control panel of the dashboard;
- malfunction of safety elements in the unit located under the hood or in the passenger compartment.
U2616 The absence of a signal arriving at the microprocessor device from the control unit of the first wheel. It is necessary to check the integrity of the power line and the quality of the connection. The problem may lie in the module itself and its software malfunction.
U3000 Malfunctions in the airbag control module. If the unit itself is workable, then it is necessary to check the sensors, squibs and pretensioners of the system.
MAZDA Transmission malfunctions
P0610 Combinations of P0610 or 0610 are associated with malfunctions in the operation of the automatic transmission control unit. A malfunction indicates a communication failure in the module or the completion of the device configuration process. In addition to contacts and wiring, it is necessary to test the unit itself, in particular, its software. You may need to upgrade the module or replace it completely.
P0703 On Mazda CX7 and other versions, this code indicates a malfunction in the operation of the brake switch B installed on the gearbox torque converter. The problem may be damage to the device’s power line. With this error, the stop lights may not work.
P0715 Malfunction in the speed controller of the input shaft of the turbine of the torque converter device. The appearance of error P0715 is accompanied by difficulties in shifting gears and the operation of the transmission unit as a whole.
P0732 Error code P0732 indicates the wrong gear ratio when the second gear
P0745 Problems in the operation of the AT (automatic transmission). On-board computer recorded a malfunction in the solenoid A control the pressure system. With error 0745, it is necessary to test the operation of the wiring and the sensor itself.
P0730 Code P0730 (0730) appears when the gear ratio is incorrect, the problem may be due to the following malfunctions:
- failure of the gearbox speed switch;
- a malfunction of one or more sensors of the transmission unit;
- damaged wiring, shorted lines, oxidation or clogging of contact elements;
- malfunctions of the gearbox control unit.
P0733 Code P0733 appears when a third gearbox is malfunctioning, the control unit reports an incorrect gear ratio. It is possible for the unit to go into emergency operation. It is necessary to test the functioning of the wiring and contacts.
P0744 The combination 0744 is a consequence of the inoperability of the torque converter lock-up solenoid. With such a problem, the gearbox will be unstable, a slow response to pressing gas when switching speeds is possible. A check of the solenoid power line is required.
P0753 Malfunction in the solenoid valve A of the gear shift system. It is necessary to test the wiring of all the sensors of the box, and also make sure that the transmission control unit is operational.
P0757 On Mazda 323 BA and other models, this code indicates a malfunction or a complete failure of the solenoid B. It is noted that the device sticks in the on position. This may be due both to the solenoid itself and to the control modules of the motor and transmission, as well as to the low level of fluid in the gearbox.
The code is fixed under the following conditions:
- on a car with a second speed on, the temperature of the consumable is more than 20 degrees;
- the transmission lever is switched to “D” mode and the engine is started;
- rotation frequency of the input shaft of the transmission unit - in the range from 225 to 4988 rpm;
- the gearbox differential housing rotates at a speed of 35 rpm;
- the ratio of the speed of the forward clutch to the frequency of rotation of the differential housing is less than 1.249 or more than 2.157.
P0758 Code P0758 appears when there is a malfunction in the gearbox solenoid device B. There may be difficulties when switching from second to third speed and vice versa, sometimes the transmission goes into emergency mode. Diagnostics of the power line connecting the device for damage or possible short circuit is required. The problem may be the clogging of the transmission oil channels by the wear of the unit.
P0762 Error code P0762 indicates sticking of the switch of the solenoid element C of the transmission unit
P0773 Electrical malfunction of the gear shifting solenoid. In accordance with the manual for the repair and maintenance of cars, the user needs to test the operation of the solenoid E.
P0841 Error P0841 indicates problems in the operation of an automatic transmission. The user first needs to test the operation of the transmission oil pressure switch controller. It is necessary to verify the quality of power supply to the controller and the integrity of its wiring with connectors. The problem may be a lack of oil or the appearance of traces of deposits and the smell of burning in it. In the latter case, the problem may lie in the internal malfunction of the gearbox, then the unit will need to be dismantled and disassembled to identify defective parts.
P0894 Error in the operation of the AT - automatic transmission system. The control unit with this code indicates slipping of the clutch. It is necessary to fully check the gearbox and eliminate defects in its operation.
Possible causes of the problem:
- shaft wear;
- torque converter damage;
- failure of the friction linings in one or more gears;
- speed switch malfunction;
- disconnection or damage to the power cable sensor box;
- malfunction of the control module.
P1783 Elevated temperature of the lubricant in the gearbox, which may lead to overheating of the unit. Long-term operation of the device in such conditions will lead to faster wear of structural elements, up to a complete failure of the transmission.
Possible causes of the problem:
- severe gearbox loads and harsh conditions of use, including slipping and towing a trailer;
- inefficient cooling of the automatic transmission or malfunction of the radiator box;
- low pressure of the lubricating fluid associated with clogged channels, filter elements, as well as a malfunction of the oil pump;
- gearbox oil level too high or low, control system or solenoid malfunction.