GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Cobalt 🢒 Brakes 🢒 Antilock Brake System 🢒 DTC C0131

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 Descriptors

DTC C0131 00: ABS Pressure Circuit

DTC C0131 5A: ABS Pressure Circuit Plausibility Failure

Circuit/System Description

The electronic brake control module (EBCM) monitors the inputs of the 2 internal brake pressure sensors and compares the reading so they correlate.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

C0131 00

The EBCM detects an internal pressure sensor are fault.

C0131 5A

The EBCM detects the 2 internal brake pressure sensor readings do not correlate.

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 Reference

ABS Description and Operation

Electrical Information Reference

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

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

C0131 00

  1. Replace the brake pressure modulator valve (BPMV).
  2. With a scan tool, perform the steering angle sensor calibration procedure.
  3. Verify DTC does not reset. If DTC reset, replace the EBCM.

C0131 5A

Verify DTC C0131 5A is not set.

⇒If DTC is set, with a scan tool perform the special function, steering angle sensor calibration.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Brake Pressure Modulator Valve Replacement
    •  Control Module References for EBCM replacement, setup, and programming