C05xx OBD-II Codes (C0500–C0599)

100 fault codes in the C05xx range. Click any code for causes, diagnostic steps, severity, and common fixes.

C0500 critical
Electric Power Steering System Malfunction
C0501 critical
EPS Control Module Internal Error
C0502 critical
EPS Control Module Communication
C0503 critical
EPS Motor Circuit
C0504 critical
EPS Motor Circuit Open
C0505 critical
EPS Motor Circuit Short to Ground
C0506 critical
EPS Motor Circuit Short to Battery
C0507 critical
EPS Motor Over-Temperature
C0508 critical
EPS Motor Current Too High
C0509 critical
EPS Motor Current Too Low
C0510 moderate
EPS Torque Sensor Circuit
C0511 moderate
EPS Torque Sensor Circuit Low
C0512 moderate
EPS Torque Sensor Circuit High
C0513 moderate
EPS Torque Sensor Calibration
C0514 moderate
EPS Torque Sensor Performance
C0515 moderate
EPS Position Sensor Circuit
C0516 moderate
EPS Position Sensor Circuit Low
C0517 moderate
EPS Position Sensor Circuit High
C0518 moderate
EPS Position Sensor Calibration
C0519 moderate
EPS Position Sensor Performance
C0520 critical
EPS Steering Column Motor Circuit
C0521 critical
EPS Column Motor Over-Current
C0522 critical
EPS Column Motor Stall Detected
C0523 critical
EPS Column Sensor Fault
C0524 critical
EPS Rack Assist Motor Circuit
C0525 critical
EPS Rack Motor Over-Current
C0526 critical
EPS Rack Motor Stall Detected
C0527 critical
EPS Rack Position Sensor
C0528 moderate
EPS Steering Angle Sensor Circuit
C0529 moderate
EPS Steering Angle Sensor Low
C0530 moderate
EPS Steering Angle Sensor High
C0531 moderate
EPS Steering Angle Sensor Calibration
C0532 moderate
EPS Steering Angle Center Offset
C0533 moderate
EPS Steering Return to Center Fault
C0534 moderate
EPS Steering Effort Too High
C0535 moderate
EPS Steering Effort Too Low
C0536 moderate
EPS Active Return Control Error
C0537 moderate
EPS Pull Compensation Error
C0538 moderate
EPS Steering Damping Control Error
C0539 moderate
EPS Variable Ratio Control Error
C0540 critical
EPS System Voltage Too Low
C0541 critical
EPS System Voltage Too High
C0542 critical
EPS Battery Voltage Sensor
C0543 critical
EPS Ignition Voltage Sensor
C0544 critical
EPS Power Supply Relay Circuit
C0545 critical
EPS Power Supply Relay Open
C0546 critical
EPS Power Supply Relay Short
C0547 critical
EPS Ground Circuit Fault
C0548 critical
EPS Ground Circuit High Resistance
C0549 moderate
EPS CAN Communication Error
C0550 moderate
EPS CAN Bus Timeout
C0551 moderate
EPS Module Configuration Error
C0552 moderate
EPS Software Version Error
C0553 moderate
EPS Calibration Data Missing
C0554 moderate
EPS System Over-Temperature
C0555 moderate
EPS Coolant Temperature Input
C0556 moderate
EPS Ambient Temperature Input
C0557 moderate
EPS Speed Signal Missing
C0558 moderate
EPS Engine RPM Signal Missing
C0559 moderate
EPS Transmission Range Signal
C0560 critical
Hydraulic Power Steering Pressure Sensor
C0561 critical
Hydraulic Power Steering Pressure Low
C0562 critical
Hydraulic Power Steering Pressure High
C0563 critical
Hydraulic Power Steering Pump Motor
C0564 critical
Hydraulic Power Steering Pump Noise
C0565 moderate
Hydraulic Power Steering Fluid Level Low
C0566 moderate
Hydraulic Power Steering Fluid Temperature
C0567 moderate
Hydraulic Power Steering Fluid Leak Detected
C0568 moderate
Hydraulic Power Steering Hose Pressure
C0569 moderate
Hydraulic Power Steering Rack Seal Leak
C0570 moderate
Power Steering Gear Box Malfunction
C0571 moderate
Power Steering Tie Rod Sensor
C0572 moderate
Power Steering Intermediate Shaft Sensor
C0573 moderate
Power Steering Column Lock Circuit
C0574 moderate
Power Steering Column Lock Stuck
C0575 moderate
Power Steering Column Lock Motor
C0576 moderate
Power Steering Column Tilt Motor Circuit
C0577 moderate
Power Steering Column Telescope Motor Circuit
C0578 moderate
Power Steering Column Memory Fault
C0579 moderate
Power Steering Column Position Error
C0580 critical
Four-Wheel Steering System Malfunction
C0581 critical
Rear Steering Motor Circuit
C0582 critical
Rear Steering Motor Open
C0583 critical
Rear Steering Motor Short
C0584 critical
Rear Steering Position Sensor
C0585 critical
Rear Steering Position Sensor Low
C0586 critical
Rear Steering Position Sensor High
C0587 critical
Rear Steering Calibration Required
C0588 critical
Rear Steering CAN Communication
C0589 critical
Rear Steering Module Internal Error
C0590 critical
Active Steering Ratio Control Error
C0591 critical
Active Steering Superposition Motor
C0592 critical
Active Steering Feedback Error
C0593 critical
Active Steering Speed Signal
C0594 critical
Active Steering Calibration
C0595 critical
Steer-by-Wire Primary Circuit
C0596 critical
Steer-by-Wire Backup Circuit
C0597 critical
Steer-by-Wire Feedback Motor
C0598 critical
Steer-by-Wire Position Correlation
C0599 critical
Steer-by-Wire System Performance
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