AutoCodes – GMC – C12FE GMC

C12FE GMC Code - ABS Pump Pressure Loss

Quick Answer

The boost pressure valve is internal to the brake pressure modulator. Common causes include Faulty Brake Pressure Modulator, Brake Pressure Modulator harness is open or shorted, Brake Pressure Modulator 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
C12FE GMC indicates ABS Pump Pressure Loss.
Common causes
Common causes include Faulty Brake Pressure Modulator, Brake Pressure Modulator harness is open or shorted, Brake Pressure Modulator 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 1,613
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on May 07, 2020
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Code C12FE GMC Description

The boost pressure valve is internal to the brake pressure modulator. The Electronic Brake Control Module (EBCM) monitors the boost pressure. The boost valve controls the amount of hydraulic boost required during braking or a vehicle stability event.
When a boost fault condition is detected, the boost control will continue applying as much pressure as possible until boost pressure is no longer available.
OBDII Code C12FE GMC - ABS Pump Pressure Loss - AutoCodes.com
C12FE GMC Code - ABS Pump Pressure Loss

What are the Possible Causes of the DTC C12FE GMC?

  • Faulty Brake Pressure Modulator
  • Brake Pressure Modulator harness is open or shorted
  • Brake Pressure Modulator circuit poor electrical connection

How to Fix the DTC C12FE GMC?

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 C12FE GMC 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.

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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 C12FE GMC Code

1. What are the common symptoms of OBDII code C12FE GMC (ABS Pump Pressure Loss)?

The common symptoms include the ABS warning light being illuminated on the dashboard, decreased braking performance, and potential activation of the vehicle's traction control system.

2. What are the possible causes of OBDII code C12FE GMC (ABS Pump Pressure Loss)?

Possible causes include a malfunctioning ABS pump, low brake fluid level, air in the brake system, damaged brake lines, or faulty wheel speed sensors.

3. How can I diagnose the OBDII code C12FE GMC (ABS Pump Pressure Loss)?

Diagnosis typically involves using a professional OBDII scanner to retrieve the specific code, inspecting the brake fluid level, checking for any visible leaks in the brake system, and testing the ABS pump and wheel speed sensors.

4. Can I drive my vehicle with OBDII code C12FE GMC (ABS Pump Pressure Loss) present?

It is not recommended to drive the vehicle with this code present, as it can affect the vehicle's braking performance and compromise safety. It is advisable to address the issue promptly.

5. How can I repair OBDII code C12FE GMC (ABS Pump Pressure Loss)?

Repair options may include replacing the ABS pump, repairing any damaged brake lines, bleeding the brake system to remove air, checking and replacing the brake fluid, or addressing any faulty wheel speed sensors.

6. Is it safe to continue driving if the ABS warning light is on due to OBDII code C12FE GMC (ABS Pump Pressure Loss)?

It is not safe to continue driving with the ABS warning light on, as it indicates a problem with the anti-lock braking system that can affect the vehicle's ability to brake effectively. Seek professional assistance to diagnose and repair the issue.

7. How much does it typically cost to repair OBDII code C12FE GMC (ABS Pump Pressure Loss)?

The cost of repair can vary depending on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Can OBDII code C12FE GMC (ABS Pump Pressure Loss) be a DIY repair?

While some basic inspections like checking brake fluid levels can be done DIY, diagnosing and repairing ABS pump pressure loss issues often require specialized tools and expertise, so it is recommended to consult a professional mechanic.

9. Will resetting the OBDII code C12FE GMC (ABS Pump Pressure Loss) make the issue go away?

Resetting the code may temporarily turn off the warning light, but if the underlying issue causing the ABS pump pressure loss is not addressed, the code is likely to reappear. It is crucial to diagnose and fix the root cause.

10. How long does it typically take to repair OBDII code C12FE GMC (ABS Pump Pressure Loss)?

The repair time can vary based on the specific cause of the issue and the availability of parts. It may take a few hours to a full day for a professional mechanic to diagnose and repair ABS pump pressure loss problems.

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