Workshop Manuals Factory service & repair Vauxhall
Vauxhall Astra J17 · Steering
17 · Steering & suspension

DTC C0456

Make
Vauxhall
Model
Astra J
Section
Power Steering System › Other Information › DTC C0456
SteeringDTC C0456

DTC C0456

Diagnostic Instructions

•  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 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.

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

Reference Information


Schematic Reference

Power Steering Schematics


Connector End View Reference

Component Connector End Views


Description and Operation

Power Steering System Description and Operation


Electrical Information Reference


Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. With a scan tool, verify that DTC C0456 4B is not set.
⇒ If the DTC is set, calibrate the steering position sensor and verify the DTC does not reset. Refer to Power Steering Control Module Calibration .
2. If the DTC resets, replace the steering gear.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•  Power Steering Assist Motor Replacement for power steering control module replacement
•  Control Module References for power steering control module programming and setup

Parts & tools for this job For Vauxhall Astra

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