What does your fault code mean?
What does your fault code mean?
Free OBD2 fault code lookup
A diagnostic trouble code (DTC) is your car's way of telling you something needs attention. This free lookup covers the 200 most common OBD2 fault codes — plain-English meanings, causes, severity, and what to do next.
254 codes found
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- B0001 Driver Frontal Stage 1 Deployment Control
- B0010 Passenger Frontal Stage 1 Deployment Control Restraints/AirbagHigh
- B0020 Left Side Airbag Deployment Control Restraints/AirbagHigh
- B0028 Right Side Airbag Deployment Control Restraints/AirbagHigh
- B0050 Driver Seatbelt Sensor Malfunction Restraints/SeatbeltMedium
- B0070 Driver Seatbelt Pretensioner Deployment Control Restraints/SeatbeltHigh
- B0080 First Row Center Seatbelt Load Limiter Deployment Control Restraints/SeatbeltHigh
- B0091 Left Side Restraints Sensor 1 Malfunction Restraints/SensorsHigh
- B00A0 Occupant Classification System (OCS) Malfunction Restraints/SensorsHigh
- B00D0 Driver Seatbelt Indicator Malfunction Restraints/IndicatorsLow
- B0100 Electronic Frontal Sensor Malfunction Restraints/SensorsHigh
- B1000 Electronic Control Unit (ECU) Internal Performance Modules/Control UnitsHigh
- B1200 Climate Control Push Button Circuit Open HVAC/Climate ControlLow
- B1318 Battery Voltage Low Electrical/PowerMedium
- B1352 Ignition Key In Circuit Failure Electrical/IgnitionMedium
- B1422 Rear Window Defogger Circuit Malfunction Electrical/AccessoriesLow
- B1600 PATS Ignition Key Transponder Signal Not Received Security/ImmobilizerHigh
- B1601 PATS Ignition Key Transponder Signal Incorrect Security/ImmobilizerHigh
- B1884 Passenger Airbag Disable (PAD) Indicator Light Circuit Failure Restraints/AirbagMedium
- B1932 Driver Airbag Circuit Open - Loop #1 Restraints/AirbagHigh
- B2290 Occupant Classification System Error Restraints/SensorsHigh
- B2292 Seatbelt Pretensioner Circuit Malfunction Restraints/SeatbeltHigh
- B2293 Airbag Status Error Restraints/AirbagHigh
- B2425 Driver Seat Heating Element Open Circuit Interior/ComfortLow
- B2477 Module Configuration Failure Modules/ProgrammingMedium
- B2513 Blower Motor Circuit Malfunction HVAC/BlowerMedium
- B2607 Immobilizer Inhibit Circuit Malfunction Security/Anti-TheftHigh
- B2800 Steering Column Lock Malfunction Security/Steering LockHigh
- B2900 VIN Mismatch Modules/SecurityMedium
- B3045 Anti-Theft System Signal Low Security/ImmobilizerHigh
- C1211 OBD-II code C1211 signals an ABS indicator lamp circuit malfunction — the warning bulb, cluster driver, or wiring between the EBCM and the cluster has failed. Anti-Lock Brakes (ABS)Medium
- C1214 OBD-II code C1214 flags an open ABS system relay coil or contacts — the EBCM cannot power the ABS solenoids or pump motor until the relay is fixed. Anti-Lock Brakes (ABS)High
- C1217 OBD-II code C1217 means the ABS pump motor has shorted internally to ground, disabling ABS and often blowing the ABS main fuse on start-up. Anti-Lock Brakes (ABS)High
- C1218 OBD-II code C1218 signals the ABS pump motor circuit is shorted to battery voltage or its ground path is open — ABS is disabled until fixed. Anti-Lock Brakes (ABS)High
- C1221 OBD-II code C1221 means the EBCM sees no signal from the left front wheel speed sensor — ABS and stability control are disabled while active. Anti-Lock Brakes (ABS)High
- C1222 OBD-II code C1222 means the EBCM sees no signal from the right front wheel speed sensor — ABS and stability control are disabled while active. Anti-Lock Brakes (ABS)High
- C1223 OBD-II code C1223 means the EBCM sees no signal from the left rear wheel speed sensor — ABS and stability control are disabled while active. Anti-Lock Brakes (ABS)High
- C1224 OBD-II code C1224 means the EBCM sees no signal from the right rear wheel speed sensor — ABS and stability control are disabled while active. Anti-Lock Brakes (ABS)High
- C1225 OBD-II code C1225 flags an erratic left front wheel speed signal — the EBCM sees brief drops or spikes and disables ABS intermittently. Anti-Lock Brakes (ABS)Medium
- C1226 OBD-II code C1226 flags an erratic right front wheel speed signal — the EBCM sees brief drops or spikes and disables ABS intermittently. Anti-Lock Brakes (ABS)Medium
- C1227 OBD-II code C1227 flags an erratic left rear wheel speed signal — the EBCM sees brief drops or spikes and disables ABS intermittently. Anti-Lock Brakes (ABS)Medium
- C1228 OBD-II code C1228 flags an erratic right rear wheel speed signal — the EBCM sees brief drops or spikes and disables ABS intermittently. Anti-Lock Brakes (ABS)Medium
- C1232 OBD-II code C1232 flags an open or shorted left front wheel speed sensor circuit — the EBCM detects an electrical fault, not just a missing signal. Anti-Lock Brakes (ABS)High
- C1233 OBD-II code C1233 flags an open or shorted right front wheel speed sensor circuit — the EBCM detects an electrical fault, not just a missing signal. Anti-Lock Brakes (ABS)High
- C1234 OBD-II code C1234 flags an open or shorted left rear wheel speed sensor circuit — the EBCM detects an electrical fault, not just a missing signal. Anti-Lock Brakes (ABS)High
- C1235 OBD-II code C1235 flags an open or shorted right rear wheel speed sensor circuit — the EBCM detects an electrical fault, not just a missing signal. Anti-Lock Brakes (ABS)High
- C1236 OBD-II code C1236 flags low battery/system voltage at the EBCM — ABS is disabled to protect the module and solenoids from unreliable operation. Anti-Lock Brakes (ABS)Medium
- C1237 OBD-II code C1237 flags high battery/system voltage at the EBCM — usually caused by an overcharging alternator or a failing voltage regulator. Anti-Lock Brakes (ABS)High
- C1238 OBD-II code C1238 means the EBCM's thermal model calculates that the ABS motor or brakes are overheated — typically from prolonged ABS activation. Anti-Lock Brakes (ABS)Medium
- C1241 OBD-II code C1241 flags a fault in the variable-effort steering (VES/EVO) circuit — power steering assist becomes fixed rather than speed-sensitive. Variable Effort SteeringMedium