C0456

DTC C0456

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructionsprovides an overview of each diagnostic category.

DTC Descriptor
DTC C0456 4B
- Steering Position Sensor Calibration not Learned

Circuit/System Description

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. If there is no communication with the power steering control module, replace the steering gear.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

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

Action Taken When the DTC Sets

* DTC C0456 is stored in memory.
* The driver information center displays the SERVICE POWER STEERING warning message.
* No Steering assist.

Conditions for Clearing the DTC

The calibration needs to be learned to the new power steering control module using a scan tool, perform the Electronic Power Steering, Special Functions, Steering Angle Sensor Centering procedure.

Reference Information
Schematic Reference

Power Steering Schematics [1][2]Electrical Diagrams
Connector End View Reference

Component Connector End Views Hybrid/EV Battery Pack X1 A4
Description and Operation

Power Steering System Description and Operation (Electronic Power Steering) Description and Operation
Electrical Information Reference

* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module Referencesfor scan tool information

Circuit/System Verification

1. Verify that DTC C0456 4B is not set.

• If the DTC is set, calibrate the steering position sensor. Refer to Power Steering Control Module Calibration Service and Repair. If the DTC resets, replace the steering gear.

2. Replace the K43 Power Steering Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

* Steering Gear Replacement Steering Gear Replacement
* Control Module References Control Module Referencesfor power steering control module replacement, setup, and programming