C0139 Code - Base Brake System Pressure Circuit/Sensor High
Quick Answer
The C0139 code indicates an issue with the base brake system pressure circuit/sensor being too high. Common causes include Faulty base brake system pressure sensor, Clogged brake lines or hoses, Malfunctioning brake master cylinder. 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 base brake system pressure sensor, Clogged brake lines or hoses, Malfunctioning brake master cylinder.
- 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 C0139 Description
The C0139 code indicates an issue with the base brake system pressure circuit/sensor being too high. The base brake system pressure sensor is responsible for monitoring the hydraulic pressure in the braking system. When the sensor detects that the pressure is too high, it triggers this diagnostic trouble code (DTC). This can result in various safety concerns as it may affect the vehicle's braking performance.
Common Causes of C0139
- Faulty base brake system pressure sensor
- Clogged brake lines or hoses
- Malfunctioning brake master cylinder
- Contaminated brake fluid
- Issues with the ABS module or hydraulic control unit
Symptoms of C0139
- Illuminated brake warning light on the dashboard
- Increased brake pedal stiffness or resistance
- Reduced braking power or effectiveness
- Abnormal noises coming from the braking system
- Uneven brake pad wear
How to Fix C0139
- Diagnose the issue using a scan tool to verify the C0139 code and determine the specific cause of the high base brake system pressure.
- Inspect the base brake system pressure sensor and related wiring for any signs of damage or malfunction. Replace the sensor if necessary.
- Check the brake lines and hoses for any blockages or leaks. Clear any obstructions or replace damaged components.
- Inspect the brake master cylinder for proper operation and replace it if deemed faulty.
- Flush and replace the brake fluid if it is contaminated or old to ensure proper brake system operation.
Cost to Fix C0139
The cost of repairing a high base brake system pressure circuit/sensor issue can vary depending on the specific cause of the problem and the extent of the repairs needed. Generally, the cost of parts for this repair can range from $100 to $300, while labor costs can add another $100 to $200 to the total. Overall, the total repair cost could be anywhere from $200 to $500. However, it is essential to note that actual repair costs can fluctuate based on location, vehicle make and model, and labor rates at the auto repair shop. It is recommended to obtain quotes from local auto repair shops for a more accurate estimate.
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Code C0139 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
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.
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