AutoCodesGMC – C025E 2018 GMC Sierra

C025E 2018 GMC Sierra 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 2018 GMC Sierra 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 186
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 04, 2023
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Code C025E 2018 GMC Sierra 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 2018 GMC Sierra - Brake Booster Vacuum Sensor Circuit - AutoCodes.com
C025E 2018 GMC Sierra Code - Brake Booster Vacuum Sensor Circuit

What are the Possible Causes of the DTC C025E 2018 GMC Sierra?

  • 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 2018 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 C025E 2018 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 C025E 2018 GMC Sierra code?

Need more information on how to fix the C025E 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 2018 GMC Sierra Code

What does the OBDII code C025E mean on a 2018 GMC Sierra?

The code C025E indicates an issue with the Brake Booster Vacuum Sensor Circuit, which monitors vacuum levels in the brake booster to ensure proper braking performance.

What are the common symptoms of code C025E on a 2018 GMC Sierra?

Symptoms may include a hard brake pedal, reduced braking performance, illuminated ABS or brake warning lights, and decreased vacuum pressure in the brake booster.

What causes the C025E code on a 2018 GMC Sierra?

Common causes include a faulty brake booster vacuum sensor, wiring or connector issues in the sensor circuit, or a malfunctioning brake booster.

How do you diagnose code C025E on a 2018 GMC Sierra?

Diagnosis typically involves using a scan tool to check for stored codes, inspecting the brake booster vacuum sensor and its wiring, and testing the vacuum pressure in the brake booster.

Can I drive with the C025E code on my 2018 GMC Sierra?

Driving with this code is not recommended as it may cause reduced braking ability and compromise safety. Have the issue addressed promptly.

How do you fix code C025E on a 2018 GMC Sierra?

Repairs may involve replacing the brake booster vacuum sensor, repairing damaged wiring or connectors, or addressing issues with the brake booster itself.

How much does it cost to repair code C025E on a 2018 GMC Sierra?

Repair costs vary depending on the diagnosis, but replacing the brake booster vacuum sensor typically costs between $150 and $300, including labor.

Is a faulty brake booster vacuum sensor a common problem for a 2018 GMC Sierra?

It’s not a widespread issue, but it can occur due to wear, electrical faults, or environmental factors affecting the sensor or wiring.

How can I prevent code C025E from appearing on my 2018 GMC Sierra?

Regular maintenance, such as inspecting the brake system components and ensuring proper vacuum pressure, can help prevent this code from occurring.

What tools are needed to troubleshoot code C025E on a 2018 GMC Sierra?

You’ll need a scan tool or diagnostic reader, a multimeter for electrical testing, and possibly a vacuum gauge to check the brake booster pressure.

Discuss the causes and fixes for C025E 2018 GMC Sierra OBDII Code

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