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Engine-Codes – GMC – C025E 2015 GMC Sierra

C025E 2015 GMC Sierra Code - Brake Booster Vacuum Sensor Circuit

Quick Answer

The C025E diagnostic trouble code (DTC) for a 2015 GMC Sierra relates to the Brake Booster Vacuum Sensor Circuit. Common causes include Faulty brake booster vacuum sensor, Vacuum leaks in the brake booster system, Wiring or connector issues in the sensor circuit. 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
C025E 2015 GMC Sierra indicates Brake Booster Vacuum Sensor Circuit.
Common causes
Common causes include Faulty brake booster vacuum sensor, Vacuum leaks in the brake booster system, Wiring or connector issues in the sensor circuit.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 30, 2024
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Code C025E 2015 GMC Sierra Description

The C025E diagnostic trouble code (DTC) for a 2015 GMC Sierra relates to the Brake Booster Vacuum Sensor Circuit. This code indicates that there is a malfunction in the circuit responsible for monitoring the vacuum level in the brake booster. The brake booster is a crucial component of the vehicle's braking system, as it amplifies the force applied to the brake pedal, making it easier to stop the vehicle. The vacuum sensor plays a key role in ensuring that the brake booster functions correctly by monitoring the vacuum pressure within the system.

OBDII Code C025E 2015 GMC Sierra - Brake Booster Vacuum Sensor Circuit
C025E 2015 GMC Sierra Code - Brake Booster Vacuum Sensor Circuit

Common Causes of C025E 2015 GMC Sierra

  1. Faulty brake booster vacuum sensor.
  2. Vacuum leaks in the brake booster system.
  3. Wiring or connector issues in the sensor circuit.
  4. Corrosion or damage to sensor components.
  5. Electronic control module (ECM) malfunction.

Symptoms of C025E 2015 GMC Sierra

  1. Increased brake pedal effort required to stop the vehicle.
  2. Longer than usual stopping distances.
  3. ABS warning light illuminated on the dashboard.
  4. Spongy or inconsistent brake pedal feel.
  5. Loss of power assistance in braking.

How to Fix C025E 2015 GMC Sierra

  1. Begin by conducting a visual inspection of the brake booster vacuum sensor and its wiring for any visible damage or corrosion.
  2. Use a multimeter to test the sensor's resistance and voltage output to determine if it is functioning within specifications.
  3. Check for vacuum leaks in the brake booster system by performing a smoke test or using a vacuum gauge.
  4. Replace the brake booster vacuum sensor if it is found to be faulty, ensuring proper installation and calibration.
  5. Clear the DTC from the vehicle's ECM using a diagnostic scan tool and test drive the vehicle to confirm that the issue has been resolved.

Cost to Fix C025E 2015 GMC Sierra

The cost of repairing a Brake Booster Vacuum Sensor Circuit issue can vary depending on the specific cause of the problem and the labor rates in your area. On average, the parts for this repair may range from $50 to $200, while labor costs can range from $100 to $300. It is advisable to contact local auto repair shops for accurate pricing based on your vehicle make and model, as well as the severity of the issue. Keep in mind that additional diagnostic time may be required to pinpoint the exact cause of the problem, which can impact the overall repair cost.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C025E 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code C025E on a 2015 GMC Sierra related to the Brake Booster Vacuum Sensor Circuit?

- Common symptoms include the illumination of the check engine light, reduced brake performance, and potential loss of power brakes.

2. What could cause the OBDII code C025E to appear on a 2015 GMC Sierra?

- The code C025E typically indicates a fault with the brake booster vacuum sensor circuit, which could be caused by wiring issues, a faulty sensor, or a problem with the brake booster itself.

3. How serious is the OBDII code C025E related to the Brake Booster Vacuum Sensor Circuit on a 2015 GMC Sierra?

- This code is considered serious as it affects the proper functioning of the brake booster, which is crucial for the vehicle's braking system. It is recommended to address this issue promptly.

4. Can driving with the OBDII code C025E on a 2015 GMC Sierra be dangerous?

- Driving with this code present can be dangerous, especially if there are noticeable brake performance issues. It is advisable to have the vehicle inspected by a qualified technician as soon as possible.

5. What are some DIY repair tips for addressing the OBDII code C025E on a 2015 GMC Sierra?

- DIY repair tips may include checking the wiring connections related to the brake booster vacuum sensor, inspecting the sensor for any visible damage, and ensuring the brake booster is functioning correctly.

6. Is it recommended to continue driving a 2015 GMC Sierra with the OBDII code C025E until it is repaired?

- It is not recommended to continue driving the vehicle with this code present, especially if there are noticeable brake issues. Continuing to drive could compromise safety and lead to further damage.

7. How can a mechanic diagnose the OBDII code C025E on a 2015 GMC Sierra?

- A mechanic can diagnose the code by using a scan tool to retrieve the specific details of the fault, testing the brake booster vacuum sensor and related components, and inspecting the wiring for any issues.

8. Are there any recalls or technical service bulletins related to the OBDII code C025E on a 2015 GMC Sierra?

- It is advisable to check with a GMC dealership or the National Highway Traffic Safety Administration (NHTSA) website for any recalls or technical service bulletins related to this specific OBDII code.

9. How much does it typically cost to repair the OBDII code C025E on a 2015 GMC Sierra at a dealership or repair shop?

- The cost of repairing this code can vary depending on the exact cause of the issue and labor rates. It is recommended to obtain quotes from different repair facilities for an accurate estimate.

10. Can resetting the OBDII code C025E on a 2015 GMC Sierra make it go away permanently?

- Resetting the code may temporarily turn off the check engine light, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is important to diagnose and fix the root cause of the problem.

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