GM Service Manual Online
For 1990-2009 cars only

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 C0460 00: Steering Position Sensor

DTC C0460 12: Steering Position Sensor Below Minimum Threshold

DTC C0460 42: Steering Position Sensor Calibration Data Set Not Programmed

DTC C0460 71: Steering Position Sensor Invalid Serial Data Received

DTC C0460 5A: Steering Position Sensor Plausibility Failure

Circuit/System Description

The electronic brake control module (EBCM) receives CAN message inputs from the steering wheel position sensor identifying the position and direction of the steering wheel rotation.

Conditions for Running the DTC

    • Ignition ON.
    • Ignition voltage is greater than 10 volts.

Conditions for Setting the DTC

C0460 00, C0460 12, C0460 5A, or C0460 71

The EBCM detects an internal steering angle sensor failure.

C0460 42

Steering angle sensor not calibrated.

Action Taken When the DTC Sets

    • The EBCM disables the ABS/traction control system (TCS)/vehicle stability enhancement system (VSES) for the duration of the ignition cycle.
    • A DIC message and/or a warning indicator may be displayed.

Conditions for Clearing the DTC

    • The condition for setting the DTC is no longer present.
    • The EBCM clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

ABS Description and Operation

Electrical Information Reference

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

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

C0460 00, C0460 12, C0460 5A, or C0460 71

  1. Verify that no U codes are set.
  2. If any of the DTCs are set refer to Diagnostic Trouble Code (DTC) List - Vehicle.
  3. Replace the steering angle sensor.

C0460 42

Verify that DTC C0460 42 is not set.

If the DTC is set perform the Steering Angle Sensor Centering.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Steering Angle Sensor Replacement