B04xx OBD-II Codes (B0400–B0499)

100 fault codes in the B04xx range. Click any code for causes, diagnostic steps, severity, and common fixes.

B0400 moderate
Definition not reliably documented — confirm against manufacturer service information
B0401 moderate
Definition not reliably documented — confirm against manufacturer service information
B0402 moderate
Definition not reliably documented — confirm against manufacturer service information
B0403 moderate
Definition not reliably documented — confirm against manufacturer service information
B0404 moderate
Definition not reliably documented — confirm against manufacturer service information
B0405 moderate
Definition not reliably documented — confirm against manufacturer service information
B0406 moderate
Definition not reliably documented — confirm against manufacturer service information
B0407 moderate
Definition not reliably documented — confirm against manufacturer service information
B0408 moderate
Definition not reliably documented — confirm against manufacturer service information
B0409 moderate
Definition not reliably documented — confirm against manufacturer service information
B0410 moderate
Definition not reliably documented — confirm against manufacturer service information
B0411 moderate
Definition not reliably documented — confirm against manufacturer service information
B0412 moderate
Definition not reliably documented — confirm against manufacturer service information
B0413 moderate
Definition not reliably documented — confirm against manufacturer service information
B0414 moderate
Definition not reliably documented — confirm against manufacturer service information
B0415 moderate
Definition not reliably documented — confirm against manufacturer service information
B0416 moderate
Definition not reliably documented — confirm against manufacturer service information
B0417 moderate
Definition not reliably documented — confirm against manufacturer service information
B0418 moderate
Definition not reliably documented — confirm against manufacturer service information
B0419 moderate
Definition not reliably documented — confirm against manufacturer service information
B0420 moderate
Definition not reliably documented — confirm against manufacturer service information
B0421 moderate
Definition not reliably documented — confirm against manufacturer service information
B0422 moderate
Definition not reliably documented — confirm against manufacturer service information
B0423 moderate
Definition not reliably documented — confirm against manufacturer service information
B0424 moderate
Definition not reliably documented — confirm against manufacturer service information
B0425 moderate
Definition not reliably documented — confirm against manufacturer service information
B0426 moderate
Definition not reliably documented — confirm against manufacturer service information
B0427 moderate
Definition not reliably documented — confirm against manufacturer service information
B0428 moderate
Definition not reliably documented — confirm against manufacturer service information
B0429 moderate
Definition not reliably documented — confirm against manufacturer service information
B0430 moderate
Definition not reliably documented — confirm against manufacturer service information
B0431 moderate
Definition not reliably documented — confirm against manufacturer service information
B0432 moderate
Definition not reliably documented — confirm against manufacturer service information
B0433 moderate
Definition not reliably documented — confirm against manufacturer service information
B0434 moderate
Definition not reliably documented — confirm against manufacturer service information
B0435 moderate
Definition not reliably documented — confirm against manufacturer service information
B0436 moderate
Definition not reliably documented — confirm against manufacturer service information
B0437 moderate
Definition not reliably documented — confirm against manufacturer service information
B0438 moderate
Definition not reliably documented — confirm against manufacturer service information
B0439 moderate
Definition not reliably documented — confirm against manufacturer service information
B0440 moderate
Definition not reliably documented — confirm against manufacturer service information
B0441 moderate
Definition not reliably documented — confirm against manufacturer service information
B0442 moderate
Definition not reliably documented — confirm against manufacturer service information
B0443 moderate
Definition not reliably documented — confirm against manufacturer service information
B0444 moderate
Definition not reliably documented — confirm against manufacturer service information
B0445 moderate
Definition not reliably documented — confirm against manufacturer service information
B0446 moderate
Definition not reliably documented — confirm against manufacturer service information
B0447 moderate
Definition not reliably documented — confirm against manufacturer service information
B0448 moderate
Definition not reliably documented — confirm against manufacturer service information
B0449 moderate
Definition not reliably documented — confirm against manufacturer service information
B0450 low
Front Washer Pump Motor Circuit Malfunction
B0451 low
Front Washer Pump Motor Open
B0452 low
Front Washer Pump Motor Short
B0453 low
Front Washer Fluid Level Sensor
B0454 low
Front Washer Nozzle Heater Circuit
B0455 low
Rear Washer Pump Motor Circuit
B0456 low
Rear Washer Pump Motor Open
B0457 low
Rear Washer Fluid Level Low
B0458 low
Washer Fluid Reservoir Heater Circuit
B0459 low
Washer System Pressure Sensor
B0460 low
Headlamp Washer Pump Circuit
B0461 low
Headlamp Washer Motor Open
B0462 low
Headlamp Washer Nozzle Fault
B0463 low
Camera Washer Pump Circuit
B0464 low
Camera Washer Nozzle Fault
B0465 low
Sensor Washer System Circuit
B0466 low
Washer Pump Relay Malfunction
B0467 low
Washer System Check Valve
B0468 low
Intensive Washer Mode Circuit
B0469 low
Washer Timer Module Fault
B0470 low
Rain Sensor Circuit Malfunction
B0471 low
Rain Sensor Circuit Open
B0472 low
Rain Sensor Circuit Short
B0473 low
Rain Sensor Calibration Error
B0474 low
Rain Sensor Signal Intermittent
B0475 low
Rain Sensor Communication Fault
B0476 low
Auto-Wipe Control Module Error
B0477 low
Auto-Wipe Sensitivity Sensor
B0478 low
Wiper Speed Auto-Adjust Fault
B0479 low
Light/Rain Sensor Combined Unit
B0480 low
Humidity Sensor Circuit
B0481 low
Humidity Sensor Range Error
B0482 low
Windshield Condition Sensor
B0483 low
Auto Headlamp Sensor Circuit
B0484 low
Ambient Light Sensor for Wipers
B0485 low
Wiper Stalk Communication Error
B0486 low
Wiper Control Switch Malfunction
B0487 low
Wiper Stalk Position Sensor
B0488 low
Wiper Washer Combination Switch
B0489 low
Multi-Function Wiper Switch
B0490 low
Wiper Control Module Internal Error
B0491 low
Wiper Timer Circuit
B0492 low
Wiper Motor Speed Feedback
B0493 low
Wiper Blade Wear Sensor
B0494 low
Wiper System Voltage Supply
B0495 low
Windshield De-Ice Sensor
B0496 low
Wiper Anti-Ice Mode Circuit
B0497 low
Auto Park Wiper Circuit
B0498 low
Smart Wiper Algorithm Fault
B0499 low
Adaptive Wiper Control Module
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