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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- C1242 OBD-II code C1242 flags an open ABS pump motor circuit — the EBCM can't drive the pump because the motor windings or drive wiring are broken. Anti-Lock Brakes (ABS)High
- C1243 OBD-II code C1243 means the EBCM commanded the ABS pump motor but it did not turn — the motor is mechanically stalled or seized in the BPMV. Anti-Lock Brakes (ABS)High
- C1244 OBD-II code C1244 flags a fault in EBCM-to-PCM engine drag control communication — the EBCM cannot request torque changes to prevent wheel lockup on deceleration. Traction ControlMedium
- C1246 OBD-II code C1246 flags an open circuit in the brake pad wear sensor loop — the EBCM cannot detect whether brake pads are worn. Brake Pad WearLow
- C1248 OBD-II code C1248 means the EBCM has commanded the red BRAKE lamp on — a serious brake fault (fluid, pressure, or hydraulic) exists on top of any ABS codes. Brake SystemHigh
- C1251 OBD-II code C1251 flags a generic malfunction in the Real-Time Damping / Road Sensing Suspension (RSS) system — adaptive damper control has been disabled. Real-Time Damping (RSS)Medium
- C1252 OBD-II code C1252 flags an invalid normal-force calculation for the left front wheel in the RSS system — damping cannot be optimised for that corner. Real-Time Damping (RSS)Medium
- C1253 OBD-II code C1253 flags an invalid normal-force calculation for the right front wheel in the RSS system — damping cannot be optimised for that corner. Real-Time Damping (RSS)Medium
- C1254 OBD-II code C1254 means the EBCM detected an abnormal power interruption on its previous shutdown — usually a wiring or ignition issue, not an internal fault. Anti-Lock Brakes (ABS)Low
- C1255 OBD-II code C1255 flags an internal failure inside the Electronic Brake Control Module (EBCM) — the module has failed its own diagnostic self-test. Anti-Lock Brakes (ABS)High
- C1256 OBD-II code C1256 flags a secondary internal fault inside the EBCM — the module's self-test detected a problem in a different internal region than C1255. Anti-Lock Brakes (ABS)High
- C1261 OBD-II code C1261 flags an electrical fault in the left front ABS inlet valve solenoid — ABS cannot hold or reduce brake pressure at that wheel. Anti-Lock Brakes (ABS)High
- C1262 OBD-II code C1262 flags an electrical fault in the left front ABS outlet valve solenoid — ABS cannot release brake pressure at that wheel. Anti-Lock Brakes (ABS)High
- C1263 OBD-II code C1263 flags an electrical fault in the right front ABS inlet valve solenoid — ABS cannot hold or reduce brake pressure at that wheel. Anti-Lock Brakes (ABS)High
- C1264 OBD-II code C1264 flags an electrical fault in the right front ABS outlet valve solenoid — ABS cannot release brake pressure at that wheel. Anti-Lock Brakes (ABS)High
- C1265 OBD-II code C1265 flags an electrical fault in the left rear ABS inlet valve solenoid — ABS cannot hold or reduce brake pressure at that wheel. Anti-Lock Brakes (ABS)High
- C1266 OBD-II code C1266 flags an electrical fault in the left rear ABS outlet valve solenoid — ABS cannot release brake pressure at that wheel. Anti-Lock Brakes (ABS)High
- C1267 OBD-II code C1267 flags an electrical fault in the right rear ABS inlet valve solenoid — ABS cannot hold or reduce brake pressure at that wheel. Anti-Lock Brakes (ABS)High
- C1268 OBD-II code C1268 flags an electrical fault in the right rear ABS outlet valve solenoid — ABS cannot release brake pressure at that wheel. Anti-Lock Brakes (ABS)High
- C1271 OBD-II code C1271 flags a fault in the left front TCS master cylinder isolation valve — traction control cannot isolate that wheel's circuit from the master cylinder. Anti-Lock Brakes (ABS)High
- C1272 OBD-II code C1272 flags a fault in the left front TCS prime valve — traction control cannot pre-charge that wheel's brake circuit for a rapid TCS event. Anti-Lock Brakes (ABS)High
- C1273 OBD-II code C1273 flags a fault in the right front TCS master cylinder isolation valve — traction control cannot isolate that wheel's circuit from the master cylinder. Anti-Lock Brakes (ABS)High
- C1274 OBD-II code C1274 flags a fault in the right front TCS prime valve — traction control cannot pre-charge that wheel's brake circuit for a rapid TCS event. Anti-Lock Brakes (ABS)High
- C1276 OBD-II code C1276 flags a fault in the delivered-torque signal from the PCM to the EBCM — traction control cannot verify what torque the engine actually produces. Traction ControlMedium
- C1277 OBD-II code C1277 flags a fault in the requested-torque signal from the EBCM to the PCM — traction control cannot ask the engine to cut power during wheel slip. Traction ControlMedium
- C1278 OBD-II code C1278 is informational — the PCM has temporarily inhibited traction control (usually to protect the engine or transmission), not a hardware fault. Traction ControlLow
- C1281 OBD-II code C1281 flags uncorrelated readings between Vehicle Stability Enhancement System (VSES) sensors — yaw, lateral accel, and steering angle disagree. Stability Control (VSES)Medium
- C1282 OBD-II code C1282 flags an out-of-range bias on the yaw rate sensor — the sensor's stationary zero reading is drifting beyond acceptable limits. Stability Control (VSES)Medium
- C1283 OBD-II code C1283 flags that the steering angle sensor is taking too long to return to centre after a turn — the sensor or its zero point is suspect. Stability Control (VSES)Medium
- C1284 OBD-II code C1284 flags an out-of-range bias on the lateral accelerometer — the sensor's stationary zero reading is drifting beyond acceptable limits. Stability Control (VSES)Medium
- C1285 OBD-II code C1285 flags an electrical fault in the lateral accelerometer circuit — the EBCM sees an open, shorted, or out-of-range sensor signal. Stability Control (VSES)Medium
- C1286 OBD-II code C1286 flags an out-of-range bias on the steering angle sensor — the sensor's stationary-centred reading is drifting beyond acceptable limits. Stability Control (VSES)Medium
- C1287 OBD-II code C1287 flags an implausible steering angle rate-of-change — the sensor is reporting movement faster than any human input could produce. Stability Control (VSES)Medium
- C1288 OBD-II code C1288 flags an electrical fault in the steering angle sensor circuit — the EBCM sees an open, shorted, or missing sensor signal. Stability Control (VSES)Medium
- C1291 OBD-II code C1291 flags open brake lamp switch contacts during deceleration — the EBCM saw the vehicle slowing but never saw the brake pedal pressed. Brake SystemMedium
- C1292 OBD-II code C1292 flags a fault in the brake fluid pressure sensor circuit — the EBCM sees an implausible or out-of-range pressure reading. Brake SystemMedium
- C1293 OBD-II code C1293 is a history flag — it indicates that code C1291 (open brake lamp switch during decel) was set in a previous ignition cycle, then cleared. Brake SystemLow
- C1294 OBD-II code C1294 flags a brake lamp switch circuit that is always active — the EBCM sees the brake applied continuously, even when the pedal is released. Brake SystemMedium
- C1295 OBD-II code C1295 flags a brake lamp switch circuit that is always open — the EBCM never sees the brake applied, even during hard braking. Brake SystemHigh
- C1296 OBD-II code C1296 flags a fault in the brake fluid pressure sensor circuit — a companion to C1292 that indicates an electrical (not just plausibility) issue. Brake SystemMedium
- C1297 OBD-II code C1297 flags that the PCM has detected a failure in the brake extended-travel switch — the pedal position sensor for cruise control and brake assist. Brake SystemMedium
- C1298 OBD-II code C1298 flags a Class 2 serial data link fault between the PCM and the EBCM — they have lost normal communication with each other. Network/CommunicationHigh
- C1326 OBD-II code C1326 flags a battery voltage out-of-range fault at the EBCM — either too low or too high for reliable ABS operation. Anti-Lock Brakes (ABS)Medium
- C1650 OBD-II code C1650 flags an internal fault in the Real-Time Damping / RSS control module — the module has failed its own self-diagnostic test. Real-Time Damping (RSS)Medium
- C1658 OBD-II code C1658 flags a calibration fault in the RSS control module — the module has lost its calibration data or has never been calibrated for this vehicle. Real-Time Damping (RSS)Low
- C1710 OBD-II code C1710 flags the left front damper actuator circuit shorted to battery voltage — the RSS module cannot control damping at that corner. Real-Time Damping (RSS)Medium
- C1711 OBD-II code C1711 flags the left front damper actuator circuit shorted to ground — the RSS module sees a dead short pulling the drive line to ground. Real-Time Damping (RSS)Medium
- C1712 OBD-II code C1712 flags an open circuit at the left front damper actuator — the RSS module sees no continuity to drive the damper solenoid. Real-Time Damping (RSS)Medium
- C1715 OBD-II code C1715 flags the right front damper actuator circuit shorted to battery voltage — the RSS module cannot control damping at that corner. Real-Time Damping (RSS)Medium
- C1716 OBD-II code C1716 flags the right front damper actuator circuit shorted to ground — the RSS module sees a dead short pulling the drive line to ground. Real-Time Damping (RSS)Medium