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
Front Wiper Motor Circuit Malfunction
B0401 moderate
Front Wiper Motor Circuit Open
B0402 moderate
Front Wiper Motor Circuit Short to Ground
B0403 moderate
Front Wiper Motor Circuit Short to Battery
B0404 moderate
Front Wiper Park Position Switch Fault
B0405 moderate
Front Wiper Low Speed Circuit
B0406 moderate
Front Wiper High Speed Circuit
B0407 moderate
Front Wiper Intermittent Circuit
B0408 moderate
Front Wiper Delay Module Fault
B0409 moderate
Front Wiper Relay Malfunction
B0410 moderate
Front Wiper Motor Overload
B0411 moderate
Front Wiper Motor Thermal Protection
B0412 moderate
Front Wiper Arm Position Sensor
B0413 moderate
Front Wiper Linkage Sensor
B0414 moderate
Front Wiper Control Module Communication
B0415 moderate
Front Wiper Motor Circuit Malfunction
B0416 moderate
Front Wiper Motor Circuit Open
B0417 moderate
Front Wiper Motor Circuit Short to Ground
B0418 moderate
Front Wiper Motor Circuit Short to Battery
B0419 moderate
Front Wiper Park Position Switch Fault
B0420 moderate
Front Wiper Low Speed Circuit
B0421 moderate
Front Wiper High Speed Circuit
B0422 moderate
Front Wiper Intermittent Circuit
B0423 moderate
Front Wiper Delay Module Fault
B0424 moderate
Front Wiper Relay Malfunction
B0425 moderate
Front Wiper Motor Overload
B0426 moderate
Front Wiper Motor Thermal Protection
B0427 moderate
Front Wiper Arm Position Sensor
B0428 moderate
Front Wiper Linkage Sensor
B0429 moderate
Front Wiper Control Module Communication
B0430 low
Rear Wiper Motor Circuit Malfunction
B0431 low
Rear Wiper Motor Circuit Open
B0432 low
Rear Wiper Motor Circuit Short
B0433 low
Rear Wiper Park Switch Fault
B0434 low
Rear Wiper Relay Fault
B0435 low
Rear Wiper Speed Control
B0436 low
Rear Wiper Intermittent Mode
B0437 low
Rear Wiper Motor Overload
B0438 low
Rear Wiper Thermal Shutdown
B0439 low
Rear Wiper Position Sensor
B0440 low
Rear Wiper Motor Circuit Malfunction
B0441 low
Rear Wiper Motor Circuit Open
B0442 low
Rear Wiper Motor Circuit Short
B0443 low
Rear Wiper Park Switch Fault
B0444 low
Rear Wiper Relay Fault
B0445 low
Rear Wiper Speed Control
B0446 low
Rear Wiper Intermittent Mode
B0447 low
Rear Wiper Motor Overload
B0448 low
Rear Wiper Thermal Shutdown
B0449 low
Rear Wiper Position Sensor
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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