Service Information

Spark

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: Pressure Sensor Electrical Failure

DTC C0131 5A: Pressure Sensor Signal Not Plausible

Circuit/System Description

The electronic brake control module (EBCM) uses input from the brake pressure sensor for more accurate control during a vehicle stability enhancement system (VSES) event.

Conditions for Running the DTC

•	Ignition ON.

•	Ignition voltage is greater than 8.0 volts.

Conditions for Setting the DTC

•	Pressure signal does not correlate to estimated pressure over time.

•	Brake Signal does not correlate to pressure signal.

•	Signal is erratic and changes faster than physically allowed.

Action Taken When the DTC Sets

•	The EBCM disables the traction control system (TCS)/vehicle stability enhancement system (VSES) for the duration of the ignition cycle, and the ABS remains functional.

•	A warning indicator on the information display module may be displayed.

Conditions for Clearing the DTC

•	Conditions for Clearing the DTC

•	The EBCM clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.

Reference Information

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

Apply and release brake pedal. Verify brake lamps operate properly.

⇒	If brake lamps do not operate properly, refer to Symptoms - Lighting .

Ignition ON, observe the scan tool EBCM brake switch signal parameter while applying and releasing the brake pedal. The reading should change between Active and Inactive.

⇒	If the parameter does not change between active and inactive, replace the EBCM assembly.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for EBCM replacement, setup, and programming