Que signifie votre code d’erreur ?
Que signifie votre code d’erreur ?
Recherche gratuite de codes défaut OBD2
Un code d’anomalie de diagnostic (DTC) est la façon dont votre voiture vous indique qu’un élément nécessite votre attention. Cette recherche gratuite couvre les 200 codes d’anomalie OBD2 les plus courants — leur signification en termes simples, leurs causes, leur niveau de gravité et la marche à suivre.
254 codes found
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- P0422 OBD-II code P0422 flags that the main catalyst on bank 1 has fallen below efficiency threshold — emissions clean-up is degraded despite good O2 sensor operation. EmissionsMedium
- P0430 Efficacité du système catalytique en dessous du seuil (Banc 2) ÉmissionsMoyen
- P0431 OBD-II code P0431 means the warm-up (close-coupled) catalyst on bank 2 has fallen below efficiency threshold during cold-start emissions monitoring. EmissionsMedium
- P0432 OBD-II code P0432 flags that the main catalyst on bank 2 has fallen below efficiency threshold — bank 2 emissions clean-up is degraded despite good O2 sensor operation. EmissionsMedium
- P0440 Dysfonctionnement du système de contrôle des émissions évaporatives (EVAP) ÉmissionsFaible
- P0441 Flux de purge incorrect du système d'émission évaporative (EVAP) ÉmissionsFaible
- P0442 Fuite mineure détectée dans le système de contrôle des émissions évaporatives ÉmissionsFaible
- P0443 OBD-II code P0443 flags an electrical fault in the EVAP purge control valve circuit — the PCM can't purge fuel vapours from the charcoal canister. EmissionsLow
- P0444 OBD-II code P0444 flags an open circuit at the EVAP purge control valve — the PCM commanded the valve but no current is flowing through the solenoid. EmissionsLow
- P0445 OBD-II code P0445 flags a shorted circuit at the EVAP purge control valve — the PCM sees excessive current flow through the solenoid drive. EmissionsLow
- P0446 OBD-II code P0446 flags an electrical fault in the EVAP vent control valve circuit — the system can't seal the tank for leak-monitor testing. EmissionsLow
- P0447 OBD-II code P0447 flags an open circuit at the EVAP vent control valve — the PCM commanded the vent valve but no current is flowing through the solenoid. EmissionsLow
- P0449 Circuit de la valve/solénoïde de ventilation des émissions évaporatives (EVAP) ÉmissionsFaible
- P0452 OBD-II code P0452 flags a low-voltage signal from the fuel tank pressure sensor — the PCM sees an unrealistically low reading, usually a bad sensor or shorted signal. EmissionsLow
- P0453 OBD-II code P0453 flags a high-voltage signal from the fuel tank pressure sensor — the PCM sees an unrealistically high reading, usually a bad sensor or open ground. EmissionsLow
- P0455 Fuite importante détectée dans le système de contrôle des émissions évaporatives ÉmissionsFaible
- P0456 Système d'émission évaporative : très petite fuite détectée ÉmissionsFaible
- P0457 OBD-II code P0457 flags an EVAP system leak detected — the EVAP self-test failed to hold pressure/vacuum. Very often caused by a loose or damaged fuel cap. EmissionsLow
- P0480 OBD-II code P0480 flags a fault in the primary cooling fan control circuit — the PCM can't reliably switch the fan on or off when needed. Engine/PowertrainHigh
- P0496 Débit de purge élevé du système d'émission évaporative (EVAP) ÉmissionsFaible
- P0500 OBD-II code P0500 flags a fault in the vehicle speed sensor circuit — the PCM is losing the speed signal used for shifts, cruise control, and the speedometer. Engine/PowertrainMedium
- P0501 OBD-II code P0501 flags an implausible vehicle speed signal — the PCM sees a speed reading that doesn't correlate with engine RPM and gear. Engine/PowertrainMedium
- P0502 OBD-II code P0502 flags a low or missing signal from the vehicle speed sensor circuit — the PCM sees no speed input at all. Engine/PowertrainMedium
- P0505 OBD-II code P0505 flags a fault in the idle air control (IAC) system — the PCM can't hold a steady idle because the IAC valve or throttle body is misbehaving. Air IntakeMedium
- P0506 OBD-II code P0506 means the engine is idling lower than the PCM commanded — usually a dirty throttle body or a vacuum restriction. Air IntakeMedium
- P0507 OBD-II code P0507 means the engine is idling higher than the PCM commanded — usually a vacuum leak or a stuck-open idle bypass in the throttle body. Air IntakeMedium
- P0521 OBD-II code P0521 flags an implausible oil pressure sensor signal — the value doesn't correlate with engine RPM and oil temperature as expected. Engine/PowertrainHigh
- P0522 OBD-II code P0522 flags a low-voltage signal from the oil pressure sensor — the PCM sees pressure well below normal, which may or may not be real. Engine/PowertrainHigh
- P0524 OBD-II code P0524 flags actual low engine oil pressure detected by the PCM — a critical warning that can indicate imminent engine damage. Engine/PowertrainHigh
- P0562 OBD-II code P0562 means the PCM has seen battery voltage fall below its minimum threshold — usually a weak battery or failing charging system. Engine/PowertrainMedium
- P0563 OBD-II code P0563 means the PCM has seen battery voltage climb above its maximum threshold — usually a failed voltage regulator or an overcharging alternator. Engine/PowertrainHigh
- P0601 OBD-II code P0601 means the PCM has detected a memory checksum error inside itself — its stored calibration data may be corrupted. Engine/PowertrainHigh
- P0602 OBD-II code P0602 means the PCM has detected it wasn't programmed correctly for this vehicle — either the flash was incomplete or the VIN and options data are missing. Engine/PowertrainHigh
- P0606 OBD-II code P0606 flags an internal PCM/ECM processor fault — the module has detected a problem in its own hardware or software self-test. Engine/PowertrainHigh
- P0627 OBD-II code P0627 flags an open circuit at the fuel pump control driver — the PCM can't reliably switch the fuel pump on. Fuel SystemHigh
- P0650 OBD-II code P0650 flags a fault in the MIL (check engine light) control circuit — the PCM can't reliably illuminate the CEL when needed. Engine/PowertrainLow
- P0700 OBD-II code P0700 is a general MIL request from the TCM — the transmission control module has detected a fault and is asking the PCM to turn on the check engine light. TransmissionHigh
- P0701 OBD-II code P0701 flags a general performance fault in the transmission control system — the TCM detects data that doesn't correlate with expected shift behaviour. TransmissionHigh
- P0705 OBD-II code P0705 flags a fault in the transmission range sensor (neutral safety switch) — the TCM can't reliably determine what gear position the shifter is in. TransmissionHigh
- P0710 OBD-II code P0710 flags a fault in the transmission fluid temperature (TFT) sensor circuit — the TCM can't measure fluid temperature for shift adaptation. TransmissionMedium
- P0715 OBD-II code P0715 flags a fault in the input/turbine speed sensor circuit — the TCM can't measure torque converter turbine speed for slip calculation. TransmissionHigh
- P0720 OBD-II code P0720 flags a fault in the output speed sensor circuit — the TCM can't determine transmission output shaft speed for shift scheduling. TransmissionHigh
- P0730 OBD-II code P0730 flags an incorrect gear ratio detected — the TCM commanded a specific gear but the input/output speed ratio doesn't match. TransmissionHigh
- P0740 OBD-II code P0740 flags a fault in the torque converter clutch (TCC) circuit — the transmission can't lock the converter to eliminate slip at cruise. TransmissionMedium
- P0741 OBD-II code P0741 flags that the torque converter clutch (TCC) has failed to lock up when commanded — the transmission can't achieve full converter lockup at cruise. TransmissionMedium
- P0750 OBD-II code P0750 flags an electrical fault at shift solenoid A — the TCM can't reliably switch the solenoid to command a gear change. TransmissionHigh
- U0001 OBD-II code U0001 flags a general fault on the high-speed CAN bus — the vehicle's fastest data network for powertrain and stability messages is corrupted or open. High-Speed CAN BusHigh
- U0100 OBD-II code U0100 flags loss of communication with the engine control module — other modules can no longer see the PCM on the network bus. Lost Module CommunicationHigh
- U0101 OBD-II code U0101 flags loss of communication with the transmission control module — the network can no longer see the TCM. Lost Module CommunicationHigh
- U0121 OBD-II code U0121 flags loss of communication with the ABS/EBCM — the network can no longer see the anti-lock brake control module. Lost Module CommunicationHigh