C0138 Chevrolet Code - Base Brake System Pressure Circuit/Sensor Low
Quick Answer
The C0138 Chevrolet code indicates a problem with the base brake system pressure circuit or sensor being too low. Common causes include Low brake fluid level due to leaks or evaporation, Malfunctioning brake master cylinder, Faulty brake pressure sensor. 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
- C0138 Chevrolet indicates Base Brake System Pressure Circuit/Sensor Low.
- Common causes
- Common causes include Low brake fluid level due to leaks or evaporation, Malfunctioning brake master cylinder, Faulty brake pressure sensor.
- 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 C0138 Chevrolet Description
The C0138 Chevrolet code indicates a problem with the base brake system pressure circuit or sensor being too low. The base brake system is a crucial component of a vehicle's braking system, responsible for generating and maintaining hydraulic pressure to enable effective braking. When the pressure in this system is too low, it can lead to issues with braking performance, potentially compromising the safety of the vehicle.
Common Causes of C0138 Chevrolet
- Low brake fluid level due to leaks or evaporation.
- Malfunctioning brake master cylinder.
- Faulty brake pressure sensor.
- Damaged brake lines or hoses.
- Electrical issues affecting the base brake system.
Symptoms of C0138 Chevrolet
- Illumination of the brake warning light on the dashboard.
- Increased brake pedal travel or sponginess.
- Longer stopping distances when braking.
- Reduced braking effectiveness, especially in emergency situations.
- Unusual noises or vibrations when applying the brakes.
How to Fix C0138 Chevrolet
- Begin by inspecting the brake fluid level and topping it up if necessary. Check for any visible leaks in the brake system.
- Perform a thorough inspection of the brake lines, hoses, and connections to identify any damage or leaks. Replace any faulty components.
- Test the brake pressure sensor to determine if it is functioning correctly. Replace the sensor if it is found to be faulty.
- Check the brake master cylinder for any signs of malfunction. Replace the master cylinder if necessary.
- Clear the diagnostic trouble codes from the vehicle's system and test drive the vehicle to ensure that the base brake system pressure is within the normal range.
Cost to Fix C0138 Chevrolet
The cost of repairing a C0138 Chevrolet code can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of parts for this repair could range from $100 to $500, with labor costs adding an additional $150 to $300. Overall, the total repair cost for addressing a base brake system pressure circuit/sensor low issue could range from $250 to $800. It is important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the shop's labor rates. It is advisable to obtain quotes from local auto repair shops for a more accurate cost estimate.
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Frequently Asked Questions about C0138 Chevrolet Code
1. What are the common symptoms of OBDII code C0138 in a Chevrolet related to the Base Brake System Pressure Circuit/Sensor Low?
- Common symptoms include the illumination of the ABS warning light on the dashboard, potential loss of ABS functionality, and issues with brake system performance.
2. What are some possible causes of the Base Brake System Pressure Circuit/Sensor Low OBDII code in a Chevrolet?
- Causes can include a faulty brake pressure sensor, damaged wiring or connectors in the brake system circuit, low brake fluid level, or a malfunctioning ABS module.
3. How can I diagnose the Base Brake System Pressure Circuit/Sensor Low issue in my Chevrolet?
- Diagnosis typically involves using a diagnostic scanner to retrieve the specific trouble code, inspecting the brake pressure sensor and related components for damage, and testing the wiring for continuity and proper connections.
4. Is it safe to drive my Chevrolet with the C0138 OBDII code related to the Base Brake System Pressure Circuit/Sensor Low?
- It is not recommended to drive your vehicle with this code present, as it may indicate potential issues with the brake system that could compromise safety. It's best to have the issue addressed promptly.
5. Can I repair the Base Brake System Pressure Circuit/Sensor Low problem in my Chevrolet on my own?
- While some DIY enthusiasts may be able to address this issue by inspecting and replacing faulty components like the brake pressure sensor or repairing damaged wiring, it's advisable to seek professional help for an accurate diagnosis and proper repair.
6. Will resetting the OBDII code C0138 related to the Base Brake System Pressure Circuit/Sensor Low make it go away permanently?
- Simply resetting the code without addressing the underlying issue will not solve the problem. The root cause of the code needs to be identified and fixed to prevent it from reoccurring.
7. How much does it typically cost to repair the Base Brake System Pressure Circuit/Sensor Low issue in a Chevrolet?
- The cost of repair can vary depending on the specific cause of the code and the labor rates in your area. It's recommended to get a diagnosis from a qualified mechanic to determine the exact cost.
8. What are the potential risks of ignoring the C0138 OBDII code related to the Base Brake System Pressure Circuit/Sensor Low?
- Ignoring this code can lead to potential brake system failures, loss of ABS functionality, and compromised vehicle safety. It's important to address the issue promptly to ensure proper braking performance.
9. Can extreme weather conditions affect the occurrence of the Base Brake System Pressure Circuit/Sensor Low OBDII code in a Chevrolet?
- Extreme temperatures or humidity levels can potentially impact the performance of brake system components, including sensors and wiring, which may contribute to the triggering of this code.
10. How long does it typically take to repair the Base Brake System Pressure Circuit/Sensor Low issue in a Chevrolet?
- The repair time can vary depending on the specific cause of the code and the complexity of the repair needed. In some cases, it may be a relatively quick fix, while in others, it could require more extensive troubleshooting and repair work.
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