Service Information

Volt

DTC C0456

•	Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

•	Review Strategy Based Diagnosis for an overview of the diagnostic approach.

•	Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC C0456 4B: Steering Position Sensor Calibration not Learned

If the power steering control module is replaced, the calibration needs to be learned to the new power steering control module using a scan tool.

The ignition is ON.

The calibration is not learned to the new power steering control module.

•	DTC C0456 is stored in memory.

•	The driver information centre displays the SERVICE POWER STEERING warning message.

•	No steering assist.

The scan tool function Steering Angle Sensor Centring procedure must be completed successfully.

Power Steering System Description and Operation : Electronic Power Steering

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Control Module References for scan tool information

⇒	If the DTC is set, calibrate the steering position sensor and verify the DTC does not reset. Refer to Power Steering Control Module Calibration .

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•	Steering Gear Replacement

•	Power Steering Assist Motor Replacement for power steering control module replacement

•	Control Module References for power steering control module programming and setup