C0139 GMC Code - Base Brake System Pressure Circuit/Sensor High
Quick Answer
The Electronic Brake Control Module (EBCM) uses an input from 2 brake fluid pressure sensors to enhance ABS braking and vehicle stability if equipped. Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module (EBCM) harness is open or shorted, Electronic Brake Control Module (EBCM) circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- C0139 GMC indicates Base Brake System Pressure Circuit/Sensor High.
- Common causes
- Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module (EBCM) harness is open or shorted, Electronic Brake Control Module (EBCM) circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code C0139 GMC Description
What are the Possible Causes of the DTC C0139 GMC?
- Faulty Electronic Brake Control Module (EBCM)
- Electronic Brake Control Module (EBCM) harness is open or shorted
- Electronic Brake Control Module (EBCM) circuit poor electrical connection
How to Fix the DTC C0139 GMC?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C0139 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about C0139 GMC Code
1. What are the common symptoms of OBDII code C0139 GMC?
- Common symptoms include the illumination of the ABS warning light on the dashboard, potential loss of traction control, and possible issues with the vehicle's braking system.
2. What can cause OBDII code C0139 GMC to trigger?
- This code is typically triggered by a high pressure reading in the base brake system, which may be caused by a malfunctioning brake pressure sensor or issues with the brake system hydraulics.
3. How serious is OBDII code C0139 GMC?
- This code indicates a problem with the base brake system pressure circuit/sensor, which can affect the vehicle's braking performance and safety. It is important to address this issue promptly.
4. What are some repair tips for OBDII code C0139 GMC?
- Repair tips may include checking and recalibrating the brake pressure sensor, inspecting the brake system for any leaks or malfunctions, and ensuring proper brake fluid levels.
5. Can I continue driving with OBDII code C0139 GMC illuminated?
- It is not recommended to continue driving with this code illuminated, as it may indicate a potential issue with the vehicle's braking system that could compromise safety.
6. How can I diagnose OBDII code C0139 GMC?
- Diagnosis typically involves using a scan tool to read the code, checking the brake pressure sensor for proper operation, inspecting the brake system for leaks or damage, and performing necessary repairs.
7. Is OBDII code C0139 GMC a common issue in GMC vehicles?
- While this code may not be as common as some other OBDII codes, it can still occur in GMC vehicles with ABS and traction control systems.
8. Can weather conditions affect the triggering of OBDII code C0139 GMC?
- Extreme weather conditions, such as very high or very low temperatures, can potentially affect the operation of the brake pressure sensor and trigger this code.
9. How much does it typically cost to repair OBDII code C0139 GMC?
- The cost of repairing this code can vary depending on the specific cause of the issue, but it may involve sensor recalibration, brake system repairs, or sensor replacement, which can range from moderate to expensive.
10. Will resetting the OBDII code C0139 GMC make it go away permanently?
- Simply resetting the code without addressing the underlying issue will not make it go away permanently. It is important to diagnose and repair the root cause of the problem to prevent the code from reoccurring.
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