C0131 is a manufacturer-specific chassis/ABS diagnostic trouble code. On many Chevrolet and GMC vehicles, C0131 is associated with the ABS pressure circuit and the brake pressure sensor monitored by the Electronic Brake Control Module (EBCM).
The exact meaning of C0131 can vary depending on the vehicle, ABS system, model year, and DTC suffix. Common GM variants include C0131 00, C0131 01, C0131 5A, and other subtypes. The vehicle-specific service information should always be used to identify the exact fault.
Fault Code Description
C0131 generally indicates a malfunction involving the ABS pressure circuit, brake pressure sensor signal, or the relationship between brake pedal input and measured brake pressure.
On many GM applications, the brake pressure sensor is integrated into the Brake Pressure Modulator Valve (BPMV) assembly and monitored by the EBCM.
The EBCM uses brake pressure information together with other vehicle data to help control ABS, traction control, and vehicle stability functions.
A C0131 code does not automatically mean that the pressure sensor itself is bad. Depending on the specific DTC suffix, possible causes include an electrical circuit problem, short to battery, abnormal sensor signal, calibration problem, implausible pressure information, connector problems, or an internal BPMV/EBCM fault.
What Does C0131 Mean?
C0131 means that the ABS control system has detected a problem with the brake pressure circuit or pressure sensor information.
The exact interpretation depends on the complete code displayed by the scan tool. For example, C0131 00, C0131 01, and C0131 5A represent different diagnostic conditions on applicable GM systems.
C0131 00
C0131 00 is commonly described on applicable GM vehicles as an ABS Pressure Circuit fault.
On some GM systems, the EBCM monitors the pressure sensor supply and signal. A supply voltage outside the expected range or a pressure-sensor signal outside the specified range can cause C0131 00.
On certain applications, the pressure sensor is internal to the BPMV. Therefore, the exact repair depends on the vehicle and the diagnostic procedure specified for that ABS system.
C0131 01
C0131 01 is used on applicable GM systems for ABS Pressure Circuit Short to Battery.
This condition indicates an electrical problem in which the pressure circuit is detected at an abnormally high electrical state or is shorted toward battery voltage.
Possible causes include damaged wiring, a short to power, connector problems, terminal damage, or a fault within the pressure-sensor circuit.
C0131 5A
C0131 5A is used on applicable GM systems for an ABS Pressure Circuit Plausibility Failure.
This condition is different from simply having a high or low electrical signal. The EBCM determines that the pressure information does not behave as expected compared with other vehicle information.
For example, the pressure signal may not correlate correctly with the expected pressure change, brake pedal input, or vehicle operating conditions.
A C0131 5A fault therefore requires checking the pressure-sensor signal, brake pedal information, wiring, calibration, and the ABS hydraulic-control assembly before replacing components.
C0131 Pressure Sensor Fault
A faulty brake pressure sensor can cause C0131 on applicable vehicles. However, the phrase “pressure sensor faulty” should not be treated as a diagnosis by itself.
The sensor signal must be checked together with the sensor supply voltage, ground, wiring, connector condition, brake pedal input, and available ABS live data.
On many GM applications where the pressure sensor is integrated into the BPMV, a sensor fault may require diagnosis or replacement of the complete BPMV/EBCM assembly rather than replacement of a separate external sensor.
Symptoms of C0131
- ABS warning light.
- Traction Control warning light.
- StabiliTrak or stability-control warning.
- Service Traction Control message.
- Service Stability System message.
- ABS system may be disabled.
- Traction control may be disabled.
- Electronic stability control may be disabled.
- Brake-related warning messages.
- Additional ABS or chassis fault codes.
- Abnormal brake-pressure behavior in some cases.
The exact symptoms depend on the vehicle and the specific C0131 subtype.
Common Causes of C0131
- Faulty brake pressure sensor.
- Internal pressure sensor fault.
- Damaged pressure sensor circuit.
- Short to battery voltage.
- Open or damaged wiring.
- Corroded electrical connector.
- Loose or damaged connector terminals.
- Incorrect sensor supply voltage.
- Incorrect pressure sensor signal.
- Brake pedal position information not correlating with pressure.
- Pressure signal changing faster than physically possible.
- Pressure sensor calibration not learned where applicable.
- Incorrectly installed or incompatible ABS component.
- Internal BPMV fault.
- EBCM fault.
- Connector or communication-related problems on certain vehicles.
How to Diagnose C0131
1. Scan the ABS Module
Use an ABS-capable diagnostic scanner and read the EBCM fault memory. Do not diagnose the base code C0131 without checking whether a suffix such as 00, 01, 5A, 4B, 3A, 06, or 0F is also displayed.
Record all related ABS, traction-control, stability-control, brake-light, and communication codes before clearing the system.
2. Check Battery Voltage
Verify battery voltage and charging-system operation. Low system voltage can interfere with ABS module operation and can create additional diagnostic codes.
3. Inspect the ABS/BPMV Connector
Inspect the ABS hydraulic-control-unit connector for corrosion, water intrusion, damaged terminals, loose connections, or signs of overheating.
4. Check the Pressure Sensor Circuit
Use the vehicle-specific wiring diagram to identify the pressure sensor supply, ground, and signal circuits.
Check the circuit for an open condition, short to battery, short to ground, excessive resistance, poor terminal contact, or damaged wiring.
5. Check Brake Pressure Live Data
If supported by the scan tool, monitor the brake pressure sensor data while the brake pedal is released and applied.
The pressure reading should respond logically to brake-pedal operation and should not show implausible jumps or changes.
6. Compare Brake Pedal Input With Pressure
On applicable GM systems, the EBCM compares brake pressure information with brake pedal information supplied through the vehicle network.
If the brake pedal is applied but the pressure signal does not respond as expected, or pressure appears to increase without corresponding brake pedal input, further diagnosis is required.
7. Check Calibration
Some C0131 variants can occur when the brake pressure sensor calibration has not been learned or falls outside the expected range.
If the vehicle-specific procedure calls for pressure sensor calibration, perform the procedure with a suitable scan tool before replacing expensive ABS components.
8. Inspect the BPMV/EBCM Assembly
If the wiring, connector, power supply, sensor circuit, and calibration are correct but C0131 remains current, the BPMV/EBCM assembly may require further testing or replacement depending on the vehicle.
C0131 Diagnostic Signal Flow
C0131 Chevrolet Silverado
C0131 Chevrolet Silverado is commonly associated with the ABS pressure circuit on applicable Silverado models.
Depending on the year, configuration, and ABS system, Silverado applications can use different C0131 subtypes including C0131 00, C0131 01, C0131 5A, and other variants.
Some Silverado systems use a brake pressure sensor integrated into the BPMV. Therefore, diagnosis should begin with the exact DTC subtype, wiring, connector, sensor supply and signal, and EBCM data before replacing the hydraulic assembly.
C0131 Chevy Tahoe
C0131 Chevy Tahoe is also associated with the ABS pressure circuit on applicable Tahoe models.
GM service information for applicable Tahoe systems identifies C0131 00 as an ABS pressure-circuit fault and includes additional variants such as C0131 3A and C0131 5A depending on the system.
On some Tahoe applications, the brake pressure sensor is integrated into the BPMV/EBCM assembly. If C0131 00 or C0131 5A remains current after the required checks, the hydraulic/control assembly may require replacement according to the vehicle-specific procedure.
C0131 Chevy Malibu
C0131 Chevy Malibu can occur on applicable Malibu models and is associated with the ABS/TCS pressure circuit.
The 2010 Chevrolet Malibu is particularly relevant because GM service information lists C0131 among its ABS/chassis diagnostic codes.
On some 2008–2011 Malibu vehicles, electrical connector resistance and terminal fretting corrosion at the BCM have also been associated with C0131 together with brake-light and related control-system symptoms. Therefore, the BCM connector and brake-light circuit should not be ignored when the vehicle-specific symptoms match this condition.
C0131 Silverado vs C0131 Tahoe vs C0131 Malibu
The basic C0131 concept is similar across applicable GM vehicles, but the diagnostic procedure can differ.
- Silverado: Check the ABS pressure circuit, pressure sensor, BPMV/EBCM, wiring and applicable C0131 subtype.
- Tahoe: Check the ABS pressure circuit, brake pressure sensor, BPMV/EBCM and calibration where required.
- Malibu: Check the pressure circuit and ABS system, while also considering brake-light and BCM connector-related problems on applicable 2008–2011 vehicles.
Is C0131 Serious?
C0131 should be treated as an important ABS fault.
Depending on the vehicle, the EBCM may disable ABS, traction control, and stability-control functions when the fault is detected.
The conventional hydraulic brakes may still operate, but important electronic braking assistance functions may not be available.
Can I Drive With C0131?
Limited driving may be possible on some vehicles if normal braking remains available and there is no red brake-system warning. However, the fault should be diagnosed as soon as possible.
Do not continue driving if the brake pedal feels abnormal, braking performance is reduced, brake fluid is leaking, or a red brake warning light is illuminated.
C0131 Repair Cost
The repair cost depends heavily on the C0131 subtype and the failed component.
- Diagnostic scan and ABS testing: approximately $80–$180.
- Wiring or connector repair: approximately $80–$350.
- BCM connector repair on applicable Malibu vehicles: approximately $100–$300+.
- Brake pressure sensor-related repair: approximately $200–$600+ where separately serviceable.
- BPMV/EBCM assembly: approximately $500–$1,500+.
- ABS hydraulic/control assembly: approximately $600–$2,000+ depending on the vehicle.
These are general estimates only. Actual costs vary according to the vehicle, model year, parts availability, labor rate, programming requirements, and failed component.
Common Repair Mistakes
Replacing the Pressure Sensor Immediately
Do not assume that C0131 automatically means the pressure sensor is bad. Check the complete circuit and the exact DTC subtype first.
Replacing the ABS Module Without Testing
A shorted wire, poor connector, incorrect sensor supply, calibration issue, or another electrical fault can produce C0131.
Ignoring the DTC Suffix
C0131 00, C0131 01, and C0131 5A can indicate different diagnostic conditions. Always record the complete code.
Ignoring the Brake-Light Circuit
On applicable Chevrolet Malibu vehicles, brake-light and BCM connector problems can accompany C0131. The brake-light operation should therefore be checked when symptoms match.
Using a Generic Pinout
ABS pressure sensor circuits and connector pinouts vary by vehicle and model year. Always use the correct wiring diagram before applying test voltage or probing the circuit.
Related Codes
- C0130 – ABS-related pressure/hydraulic system fault on applicable systems.
- C0131 00 – ABS Pressure Circuit.
- C0131 01 – ABS Pressure Circuit Short to Battery on applicable GM systems.
- C0131 03 – ABS Pressure Circuit Below Threshold on applicable systems.
- C0131 06 – ABS Pressure Circuit Short to Ground or Open on applicable systems.
- C0131 0F – ABS Pressure Circuit Erratic on applicable systems.
- C0131 4B – ABS Pressure Circuit Calibration Not Learned on applicable systems.
- C0131 5A – ABS Pressure Circuit Plausibility Failure on applicable systems.
- C0131 55 – ABS Pressure Circuit Expected Number of Transitions or Events Not Reached on applicable systems.
- C0161 – Brake-related electrical/control fault on applicable GM vehicles.
- C0277 – Brake-related control fault on applicable GM vehicles.
FAQ About C0131
What does C0131 mean?
C0131 is a manufacturer-specific chassis/ABS code associated with the ABS pressure circuit and brake pressure information on applicable vehicles.
What does C0131 00 mean?
C0131 00 commonly indicates an ABS Pressure Circuit fault on applicable GM vehicles.
What does C0131 01 mean?
C0131 01 indicates an ABS Pressure Circuit Short to Battery on applicable GM ABS systems.
What does C0131 5A mean?
C0131 5A indicates an ABS Pressure Circuit Plausibility Failure on applicable GM systems. The pressure information does not correlate with expected vehicle or brake-pressure behavior.
Can a bad pressure sensor cause C0131?
Yes. A faulty brake pressure sensor can cause C0131. However, the sensor circuit, supply voltage, wiring, connector, brake pedal information, and BPMV/EBCM should also be checked.
What does C0131 mean on a Silverado?
On applicable Chevrolet Silverado vehicles, C0131 is associated with the ABS pressure circuit. The exact diagnosis depends on the C0131 subtype and the ABS system installed on the truck.
What does C0131 mean on a Chevy Tahoe?
On applicable Chevrolet Tahoe vehicles, C0131 is associated with the ABS pressure circuit. Depending on the system, additional suffixes can identify electrical, calibration, or plausibility-related conditions.
What does C0131 mean on a 2010 Chevy Malibu?
On applicable 2010 Chevrolet Malibu vehicles, C0131 is associated with the ABS/TCS pressure circuit. Diagnosis should include the ABS pressure system, brake pedal information, wiring, connectors, and relevant BCM circuits when the vehicle symptoms indicate a related electrical problem.
Does C0131 mean I need a new ABS module?
Not always. The exact C0131 subtype and vehicle-specific diagnostic procedure must be followed before replacing the ABS module or BPMV.
Can C0131 cause Service StabiliTrak?
Yes. On applicable GM vehicles, an ABS pressure-circuit fault can cause the ABS, traction-control, and stability-control systems to be disabled and may produce Service StabiliTrak or related warning messages.
Final Result
C0131 is a manufacturer-specific ABS/chassis diagnostic trouble code associated with the brake pressure circuit on applicable vehicles.
The most important point is to identify the complete code, such as C0131 00, C0131 01, or C0131 5A, because the diagnostic meaning can change with the suffix.
On applicable Chevrolet Silverado, Chevrolet Tahoe, and Chevrolet Malibu vehicles, diagnosis may involve the brake pressure sensor, BPMV/EBCM, wiring, connectors, brake pedal information, calibration, or related electrical circuits.
Do not replace the pressure sensor or ABS module based on the base code alone. Confirm the exact vehicle-specific DTC definition and complete the appropriate electrical and ABS diagnostic tests first.