AutoCodes – Generic – C0139

C0139 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 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.

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Code Popularity 4,140

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0139 Description

The Electronic Brake Control Module (EBCM) uses an input from 2 brake fluid pressure sensors to enhance ABS braking and vehicle stability if equipped.

OBDII Code C0139 - Base Brake System Pressure Circuit/Sensor High - AutoCodes.com — C0139 Code - Base Brake System Pressure Circuit/Sensor High

What does this mean?

What are the Possible Causes of the DTC C0139?

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?

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 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.

Need more information about the C0139 code?

Need more information on how to fix the C0139 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0139 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C0139 Buick — Base Brake System Pressure Circuit/Sensor High
C0139 Cadillac — Base Brake System Pressure Circuit/Sensor High
C0139 Chevrolet — Base Brake System Pressure Circuit/Sensor High
C0139 GMC — Base Brake System Pressure Circuit/Sensor High
C0139 Pontiac — Base Brake System Pressure Circuit/Sensor High
C0139 Saturn — Base Brake System Pressure Circuit/Sensor High

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C0139 Code

1. What are the common symptoms of OBDII code C0139?

- Common symptoms include the illumination of the ABS warning light on the dashboard, a decrease in brake performance, and potential issues with the vehicle's stability control system.

2. What does OBDII code C0139 indicate?

- OBDII code C0139 refers to an issue with the base brake system pressure circuit or sensor, specifically indicating a high pressure reading.

3. What are the possible causes of OBDII code C0139?

- Possible causes include a faulty brake pressure sensor, damaged wiring or connectors in the brake system circuit, or an issue with the brake control module.

4. How can I diagnose the cause of OBDII code C0139?

- Diagnosing the cause typically involves using a scan tool to retrieve the code and then performing a thorough inspection of the brake pressure sensor, wiring, and connectors for any visible damage or issues.

5. Can driving with OBDII code C0139 cause further damage to the vehicle?

- Continuing to drive with OBDII code C0139 may lead to further brake system issues, compromised safety, and potential damage to other components of the vehicle.

6. What are some repair tips for resolving OBDII code C0139?

- Repair tips may include checking and replacing the brake pressure sensor if necessary, inspecting and repairing any damaged wiring or connectors, and resetting the trouble code after completing the repairs.

7. Is it safe to drive my vehicle with OBDII code C0139?

- It is not recommended to drive the vehicle with OBDII code C0139, as it can affect the proper functioning of the brake system and compromise safety on the road.

8. How much does it typically cost to repair OBDII code C0139?

- The cost of repairing OBDII code C0139 can vary depending on the specific cause of the issue, but it may range from a few hundred dollars to over a thousand dollars, including parts and labor.

9. Can OBDII code C0139 be reset without making any repairs?

- While the code can be reset using a scan tool, it is important to address the underlying issue causing OBDII code C0139 to prevent further problems and ensure the vehicle's safety and performance.

10. How long does it take to repair OBDII code C0139?

- The repair time for OBDII code C0139 can vary based on the cause of the issue, but it may take a few hours to a full day to diagnose the problem, obtain necessary parts, and complete the repairs.