C1239 2017 GMC Sierra Code - Brake Pressure Sensor 1/2 Correlation
Quick Answer
The C1239 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a Brake Pressure Sensor 1/2 Correlation issue. Common causes include Faulty brake pressure sensor 1 or sensor 2, Wiring harness issues or loose connections, Hydraulic system leaks or air in the brake lines. 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 2017 GMC Sierra indicates Brake Pressure Sensor 1/2 Correlation.
- Common causes
- Common causes include Faulty brake pressure sensor 1 or sensor 2, Wiring harness issues or loose connections, Hydraulic system leaks or air in the brake lines.
- 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 C1239 2017 GMC Sierra Description
The C1239 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a Brake Pressure Sensor 1/2 Correlation issue. This means that there is a discrepancy between the readings of the brake pressure sensors 1 and 2, which are responsible for monitoring the hydraulic pressure in the braking system. This can lead to improper braking performance and potentially compromise the vehicle's safety.
Common Causes of C1239 2017 GMC Sierra
- Faulty brake pressure sensor 1 or sensor 2
- Wiring harness issues or loose connections
- Hydraulic system leaks or air in the brake lines
- ABS module malfunction
- Faulty ECU or software glitches
Symptoms of C1239 2017 GMC Sierra
- ABS warning light illuminated on the dashboard
- Pulsating brake pedal during braking
- Longer stopping distances
- Uneven brake pad wear
- Increased brake noise or vibration
How to Fix C1239 2017 GMC Sierra
- Diagnose the issue using a diagnostic scan tool to pinpoint the exact cause of the correlation problem.
- Inspect the brake pressure sensors, wiring, and hydraulic system for any visible damage or issues.
- Replace the faulty brake pressure sensor(s) or repair any wiring harness problems.
- Bleed the brake system to ensure proper hydraulic pressure and eliminate any air bubbles.
- Clear the DTC and test drive the vehicle to verify that the issue has been resolved.
Cost to Fix C1239 2017 GMC Sierra
The typical repair costs for addressing a Brake Pressure Sensor 1/2 Correlation issue in a 2017 GMC Sierra can range from $200 to $500, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary depending on factors such as location, vehicle make and model, and engine type. It's recommended to check with local repair shops for a more accurate estimate.
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Frequently Asked Questions about C1239 2017 GMC Sierra Code
1. What are the common symptoms of OBDII code C1239 in a 2017 GMC Sierra related to the Brake Pressure Sensor 1/2 Correlation?
- Common symptoms may include the ABS warning light illuminating on the dashboard, issues with the brake system, and potential loss of stability control.
2. What can cause the OBDII code C1239 in a 2017 GMC Sierra?
- The code C1239 can be triggered by issues such as a faulty brake pressure sensor, wiring problems, or a malfunction in the ABS control module.
3. How serious is the Brake Pressure Sensor 1/2 Correlation issue indicated by code C1239 in a 2017 GMC Sierra?
- This issue is considered serious as it directly affects the proper functioning of the vehicle's ABS and stability control systems, compromising overall safety.
4. Can I continue driving my 2017 GMC Sierra with OBDII code C1239 present?
- It is not recommended to continue driving with this code active, as it can impact the performance of the brake system and stability control, potentially leading to unsafe driving conditions.
5. How can I diagnose the cause of OBDII code C1239 in my 2017 GMC Sierra?
- Diagnosis typically involves using a diagnostic scanner to read the code, checking the brake pressure sensor and related wiring for faults, and inspecting the ABS control module.
6. What are some repair options for fixing OBDII code C1239 in a 2017 GMC Sierra?
- Repair options may include replacing the faulty brake pressure sensor, repairing damaged wiring, or reprogramming the ABS control module to resolve the correlation issue.
7. Is it possible to reset the OBDII code C1239 in a 2017 GMC Sierra without fixing the underlying issue?
- While you can clear the code temporarily, it will likely reappear until the root cause of the Brake Pressure Sensor 1/2 Correlation problem is addressed.
8. Can a DIY enthusiast fix the OBDII code C1239 issue in a 2017 GMC Sierra?
- DIY repair of this issue may be challenging due to the complexity of the ABS system, and it is recommended to seek professional help for an accurate diagnosis and proper repair.
9. How much does it typically cost to repair OBDII code C1239 related to the Brake Pressure Sensor 1/2 Correlation in a 2017 GMC Sierra?
- The cost of repair can vary depending on the exact cause of the issue, but it may involve parts replacement, wiring repairs, or ABS module reprogramming, potentially ranging from a few hundred to over a thousand dollars.
10. What preventative maintenance can help avoid triggering OBDII code C1239 in a 2017 GMC Sierra?
- Regularly inspecting the brake system, including the brake pressure sensor, and addressing any issues promptly can help prevent the occurrence of code C1239 and ensure the proper functioning of the ABS system.
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