AutoCodes – Generic – C025E

C025E Code - Brake Booster Vacuum Sensor Circuit

Quick Answer

The Brake Booster Vacuum Sensor monitors the pressure in the brake booster. Common causes include Faulty Brake Booster Vacuum Sensor, Brake Booster Vacuum Sensor harness is open or shorted, Brake Booster Vacuum Sensor 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: C025E indicates Brake Booster Vacuum Sensor Circuit.
Common causes: Common causes include Faulty Brake Booster Vacuum Sensor, Brake Booster Vacuum Sensor harness is open or shorted, Brake Booster Vacuum Sensor 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.

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Code Popularity 1,584

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 04, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C025E Description

The Brake Booster Vacuum Sensor monitors the pressure in the brake booster. The Electronic Brake Control Module (EBCM) supplies a 5 V reference and a low reference circuit to the Brake Booster Vacuum Sensor. The vacuum sensor supplies a voltage signal in relation to the pressure in the brake booster to Electronic Brake Control Module. The Diagnostic Trouble Code (DTC) will be set when a short to ground or a short to voltage is detected on the 5V reference circuit.

OBDII Code C025E - Brake Booster Vacuum Sensor Circuit - AutoCodes.com — C025E Code - Brake Booster Vacuum Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC C025E?

Faulty Brake Booster Vacuum Sensor
Brake Booster Vacuum Sensor harness is open or shorted
Brake Booster Vacuum Sensor circuit poor electrical connection
Faulty Electronic Brake Control Module (EBCM)

How to Fix the DTC C025E?

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 C025E 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 C025E code?

Need more information on how to fix the C025E code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C025E code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C025E Buick — Brake Booster Vacuum Sensor Circuit
C025E Cadillac — Brake Booster Vacuum Sensor Circuit
C025E Chevrolet — Brake Booster Vacuum Sensor Circuit
C025E GMC — Brake Booster Vacuum Sensor Circuit

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 Code

1. What does OBDII code C025E indicate?

The code C025E indicates a problem with the Brake Booster Vacuum Sensor Circuit.

2. What are the common symptoms of OBDII code C025E?

Common symptoms include the brake pedal feeling unusual, changes in brake performance, and the illumination of the Check Engine Light.

3. What are the possible causes of OBDII code C025E?

Possible causes include a faulty brake booster vacuum sensor, damaged wiring or connectors in the sensor circuit, or a problem with the brake booster itself.

4. How can I diagnose the issue related to OBDII code C025E?

Diagnosis typically involves inspecting the brake booster vacuum sensor, checking the sensor circuit for any faults, and scanning the vehicle's computer for additional error codes.

5. Can I drive my vehicle with OBDII code C025E present?

It is not recommended to drive your vehicle with this code present, as it may affect the proper functioning of the braking system.

6. How can I repair OBDII code C025E?

Repair options include replacing the brake booster vacuum sensor, repairing any damaged wiring or connectors, or addressing any issues with the brake booster itself.

7. Is it possible to reset OBDII code C025E without fixing the issue?

While you can clear the error code with an OBDII scanner, it is crucial to address the underlying issue causing the code to prevent further problems with the braking system.

8. Are there any DIY tips for troubleshooting OBDII code C025E?

DIY tips include visually inspecting the sensor and its wiring for any obvious damage, ensuring proper connections, and performing a reset to see if the code reappears.

9. Do I need a professional mechanic to fix OBDII code C025E?

While some DIY enthusiasts may be able to address the issue, it is recommended to consult a professional mechanic for a thorough diagnosis and proper repair of the brake booster vacuum sensor circuit.

10. How much does it typically cost to repair OBDII code C025E?

The cost of repairing this code can vary depending on the specific issue, but it may involve parts and labor expenses ranging from $100 to $500 or more.