C0138 Buick Code - Base Brake System Pressure Circuit/Sensor Low
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
- C0138 Buick indicates Base Brake System Pressure Circuit/Sensor Low.
- 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 C0138 Buick Description
What are the Possible Causes of the DTC C0138 Buick?
- 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 C0138 Buick?
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 C0138 Buick 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 C0138 Buick Code
1. What are the common symptoms of OBDII code C0138 in a Buick related to the base brake system pressure circuit/sensor low issue?
- Common symptoms include the illumination of the ABS warning light on the dashboard, decreased brake performance, and potential activation of the vehicle's traction control system.
2. What are the possible causes of OBDII code C0138 in a Buick?
- The code C0138 in a Buick can be triggered by issues such as a faulty brake pressure sensor, damaged wiring or connectors in the brake system, low brake fluid levels, or a malfunctioning ABS module.
3. How can I diagnose the base brake system pressure circuit/sensor low issue in my Buick?
- A proper diagnosis involves using an OBDII scanner to retrieve the specific code, inspecting the brake fluid levels, checking the brake pressure sensor and related wiring, and conducting a thorough visual inspection of the brake system components.
4. Can I continue driving my Buick with OBDII code C0138?
- It is not recommended to drive your Buick with the base brake system pressure circuit/sensor low issue as it can compromise your vehicle's braking performance and safety. It is advisable to have the issue diagnosed and repaired promptly.
5. How can I repair OBDII code C0138 in my Buick?
- Repairing code C0138 may involve replacing the faulty brake pressure sensor, repairing damaged wiring or connectors, refilling the brake fluid to the proper level, or addressing any issues with the ABS module as necessary.
6. Is it necessary to reset the OBDII code C0138 after repairing the base brake system pressure circuit/sensor low issue in my Buick?
- Yes, it is important to clear the code using an OBDII scanner after fixing the underlying problem. This will reset the ABS system and ensure the proper functioning of the brake system.
7. Can a DIY enthusiast fix OBDII code C0138 in a Buick?
- While some simple checks like inspecting brake fluid levels can be done by DIY enthusiasts, diagnosing and repairing complex issues related to the base brake system pressure circuit/sensor low code may require professional assistance to ensure proper and safe repairs.
8. How much does it cost to repair OBDII code C0138 in a Buick?
- The cost of repairing code C0138 in a Buick can vary depending on the specific cause of the issue, parts needed for replacement, and labor costs. It is advisable to get a diagnosis from a qualified mechanic to determine the exact repair costs.
9. Will OBDII code C0138 cause my Buick to fail an emissions test?
- While code C0138 is related to the brake system and not emissions specifically, it is still important to address and repair the issue to ensure the overall safety and performance of your vehicle.
10. How often does the base brake system pressure circuit/sensor low issue occur in Buick vehicles?
- The occurrence of OBDII code C0138 in Buick vehicles can vary, but it is not an extremely common issue. Proper maintenance and timely brake system inspections can help prevent such problems.
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