C1239 2015 GMC Sierra Code - Brake Pressure Sensor 1/2 Correlation
Quick Answer
The Electronic Brake Control Module uses inputs from the Electronic Brake Control Brake Pedal Position Sensor to determine when the brake is applied and how much force is used. Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module harness is open or shorted, Electronic Brake Control Module 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
- C1239 2015 GMC Sierra indicates Brake Pressure Sensor 1/2 Correlation.
- Common causes
- Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module harness is open or shorted, Electronic Brake Control Module 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 C1239 2015 GMC Sierra Description
Brake pressure sensor information is communicated from the Electronic Brake Control Module (EBCM) to the Hybrid Control Processor (HCP). This information is used to schedule regenerative braking and engine autostops.
The Diagnostic Trouble Code (DTC) will be set when the Engine Control Module (ECM) detects a corrupted data message from the Electronic Brake Control Module.
What are the Possible Causes of the DTC C1239 2015 GMC Sierra?
- Faulty Electronic Brake Control Module (EBCM)
- Electronic Brake Control Module harness is open or shorted
- Electronic Brake Control Module circuit poor electrical connection
- Faulty Starter/Generator Control Module
How to Fix the DTC C1239 2015 GMC Sierra?
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 C1239 2015 GMC Sierra 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 C1239 2015 GMC Sierra code?
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Frequently Asked Questions about C1239 2015 GMC Sierra Code
1. What are the common symptoms of OBDII code C1239 in a 2015 GMC Sierra?
- Common symptoms include the illumination of the ABS warning light on the dashboard, potential loss of traction control functionality, and issues with brake system performance.
2. What does the OBDII code C1239 Brake Pressure Sensor 1/2 Correlation indicate in a 2015 GMC Sierra?
- This code indicates a discrepancy between the readings of brake pressure sensors 1 and 2, which are crucial for the proper functioning of the vehicle's ABS system.
3. What are the possible causes of OBDII code C1239 in a 2015 GMC Sierra?
- Potential causes include a malfunctioning brake pressure sensor, damaged wiring or connectors related to the sensors, or issues with the ABS module itself.
4. How can I diagnose the underlying issue causing OBDII code C1239 in my 2015 GMC Sierra?
- Diagnosing the problem typically involves using a professional OBDII scanner to retrieve the specific fault codes, testing the brake pressure sensors, and inspecting the related wiring and connectors for any signs of damage.
5. Is it safe to continue driving my 2015 GMC Sierra with OBDII code C1239 present?
- It is not recommended to drive the vehicle with this code active, as it may affect the proper functioning of the ABS system and compromise overall braking performance.
6. Can I reset the OBDII code C1239 in my 2015 GMC Sierra myself?
- While you can attempt to clear the code using an OBDII scanner, it is crucial to address the underlying issue causing the code to prevent it from reoccurring.
7. Are there any DIY repair tips for resolving OBDII code C1239 in a 2015 GMC Sierra?
- DIY repair options may include checking and cleaning the connectors and wiring related to the brake pressure sensors, but more complex issues may require professional diagnosis and repair.
8. How much does it typically cost to repair OBDII code C1239 in a 2015 GMC Sierra?
- The cost of repair can vary depending on the specific cause of the issue, but it may involve sensor replacement, wiring repairs, or ABS module diagnostics, with costs ranging from a few hundred to over a thousand dollars.
9. Can a faulty brake pressure sensor cause other problems in a 2015 GMC Sierra besides triggering OBDII code C1239?
- Yes, a faulty brake pressure sensor can potentially affect the overall performance of the ABS system, traction control, and the vehicle's braking efficiency, posing a safety risk.
10. How often should I have the brake system and sensors inspected in my 2015 GMC Sierra to prevent OBDII code C1239 from occurring?
- It is recommended to have regular brake system inspections as part of routine maintenance, and any signs of sensor malfunction or ABS issues should be addressed promptly to avoid triggering fault codes like C1239.
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