C04xx OBD-II Codes (C0400–C0499)
100 fault codes in the C04xx range. Click any code for causes, diagnostic steps, severity, and common fixes.
C0400 low
Cruise Control System Malfunction
C0401 low
Cruise Control Module Internal Error
C0402 low
Cruise Control Module Communication
C0403 low
Cruise Control Switch Circuit
C0404 low
Cruise Control Switch Circuit Low
C0405 low
Cruise Control Switch Circuit High
C0406 low
Cruise Control Resume Switch
C0407 low
Cruise Control Set Switch
C0408 low
Cruise Control Cancel Switch
C0409 moderate
Cruise Control On/Off Switch
C0410 moderate
Cruise Control Servo Motor Circuit
C0411 moderate
Cruise Control Servo Motor Open
C0412 moderate
Cruise Control Servo Motor Short
C0413 moderate
Cruise Control Throttle Position Error
C0414 moderate
Cruise Control Speed Signal Missing
C0415 low
Cruise Control Vehicle Speed Sensor
C0416 low
Cruise Control Brake Switch Input
C0417 low
Cruise Control Clutch Switch Input
C0418 low
Cruise Control Gear Position Input
C0419 low
Cruise Control Throttle Actuator
C0420 low
Cruise Control Throttle Response Slow
C0421 low
Cruise Control Throttle Response Fast
C0422 low
Cruise Control Over-Speed Condition
C0423 low
Cruise Control Under-Speed Condition
C0424 low
Cruise Control System Performance
C0425 low
Cruise Control Decel Rate Too High
C0426 low
Cruise Control Accel Rate Too High
C0427 low
Cruise Control Engine RPM Signal
C0428 low
Cruise Control Transmission Input
C0429 low
Cruise Control Vacuum Leak
C0430 moderate
Adaptive Cruise Control System Malfunction
C0431 moderate
Adaptive Cruise Radar Sensor Blocked
C0432 moderate
Adaptive Cruise Radar Sensor Misaligned
C0433 moderate
Adaptive Cruise Radar Sensor Circuit
C0434 moderate
Adaptive Cruise Radar Sensor Performance
C0435 moderate
Adaptive Cruise Camera Sensor Blocked
C0436 moderate
Adaptive Cruise Camera Sensor Circuit
C0437 moderate
Adaptive Cruise Camera Calibration Required
C0438 moderate
Adaptive Cruise Following Distance Error
C0439 moderate
Adaptive Cruise Target Detection Error
C0440 moderate
Adaptive Cruise Brake Request Error
C0441 moderate
Adaptive Cruise Throttle Request Error
C0442 moderate
Adaptive Cruise System Voltage Low
C0443 moderate
Adaptive Cruise System Voltage High
C0444 moderate
Adaptive Cruise Control Module Internal
C0445 moderate
Adaptive Cruise CAN Communication Error
C0446 moderate
Adaptive Cruise Sensor Temperature High
C0447 moderate
Adaptive Cruise Object Detection Fault
C0448 moderate
Adaptive Cruise Speed Limiter Malfunction
C0449 moderate
Adaptive Cruise Stop and Go Fault
C0450 critical
Automatic Emergency Braking System Malfunction
C0451 critical
AEB Forward Collision Warning Circuit
C0452 critical
AEB Forward Sensor Blocked
C0453 critical
AEB Forward Sensor Misaligned
C0454 critical
AEB Brake Actuator Circuit
C0455 critical
AEB Brake Actuator Performance
C0456 critical
AEB System Disabled Due to Fault
C0457 moderate
AEB Pedestrian Detection Error
C0458 moderate
AEB Cyclist Detection Error
C0459 moderate
AEB Cross Traffic Detection Error
C0460 moderate
AEB Rear Collision Warning Circuit
C0461 moderate
AEB Rear Sensor Blocked
C0462 moderate
AEB Rear Sensor Misaligned
C0463 moderate
AEB Brake Pre-Fill Error
C0464 moderate
AEB Brake Assist Malfunction
C0465 moderate
AEB System Calibration Required
C0466 moderate
AEB Module Communication Error
C0467 moderate
AEB Module Internal Fault
C0468 moderate
AEB System Voltage Error
C0469 moderate
AEB System Performance
C0470 low
Lane Departure Warning System Malfunction
C0471 low
Lane Keep Assist System Malfunction
C0472 low
Lane Keep Assist Motor Circuit
C0473 low
Lane Keep Assist Camera Error
C0474 low
Lane Departure Camera Blocked
C0475 low
Lane Departure Camera Calibration
C0476 low
Blind Spot Monitor System Malfunction
C0477 low
Blind Spot Monitor Sensor Left
C0478 low
Blind Spot Monitor Sensor Right
C0479 low
Blind Spot Monitor Communication Error
C0480 low
Rear Cross Traffic Alert Malfunction
C0481 low
Rear Cross Traffic Sensor Left
C0482 low
Rear Cross Traffic Sensor Right
C0483 low
Rear Cross Traffic Communication Error
C0484 low
Driver Attention Monitor Malfunction
C0485 low
Traffic Sign Recognition System Fault
C0486 low
Traffic Sign Camera Circuit
C0487 low
Night Vision System Malfunction
C0488 low
Night Vision Camera Circuit
C0489 low
Head-Up Display ADAS Integration Error
C0490 low
Parking Assist Sensor System Fault
C0491 low
Parking Assist Sensor Front Center
C0492 low
Parking Assist Sensor Front Left
C0493 low
Parking Assist Sensor Front Right
C0494 low
Parking Assist Sensor Rear Center
C0495 low
Parking Assist Ultrasonic Module
C0496 low
Parking Assist Camera Circuit
C0497 low
Surround View Camera System Fault
C0498 low
Automatic Parking System Malfunction
C0499 low
Automatic Parking Steering Control Error