AutoCodes – Buick – C12FE Buick

C12FE Buick 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 Buick 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.

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Code Popularity 832

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 May 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C12FE Buick 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 Buick - ABS Pump Pressure Loss - AutoCodes.com — C12FE Buick Code - ABS Pump Pressure Loss

What does this mean?

What are the Possible Causes of the DTC C12FE Buick?

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 Buick?

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 Buick 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 Buick Code

1. What does the OBDII code C12FE mean on a Buick?

The C12FE code indicates "ABS Pump Pressure Loss," meaning the ABS module has detected a loss of hydraulic pressure in the ABS pump system.

2. What are the common symptoms of the C12FE code in a Buick?

Common symptoms include an illuminated ABS warning light, reduced braking performance, longer stopping distances, or the ABS system failing to engage during hard braking.

3. What causes the C12FE ABS Pump Pressure Loss code to appear?

Possible causes include a faulty ABS pump, hydraulic fluid leaks, low brake fluid levels, a damaged ABS module, or air trapped in the brake lines.

4. Can I still drive my Buick with the C12FE code?

While the vehicle may still be drivable, the ABS system may not function properly, increasing the risk of skidding or loss of control during emergency braking.

5. How do I diagnose the C12FE code on my Buick?

Start by checking the brake fluid level, inspecting for leaks, and ensuring there is no air in the system. Use an OBDII scanner capable of reading ABS codes to pinpoint the issue.

6. What repairs are typically needed to fix the C12FE code?

Repairs may include replacing the ABS pump, repairing brake fluid leaks, bleeding the brake system, or replacing the ABS module if it's faulty.

7. How much does it cost to fix the C12FE code?

Repair costs can vary widely, ranging from $100 for simple fixes like bleeding the brakes to over $1,000 for replacing the ABS pump or module.

8. Can low brake fluid trigger the C12FE code on a Buick?

Yes, low brake fluid can lead to a loss of pressure in the ABS pump and trigger the C12FE code.

9. How can I prevent the C12FE code from recurring?

Regular maintenance, such as checking brake fluid levels, inspecting for leaks, and promptly repairing brake system issues, can help prevent this code from reappearing.

10. Does the C12FE code always mean the ABS pump is faulty?

No, the code could also be caused by other issues like air in the brake lines, a bad ABS module, or hydraulic fluid leaks. Proper diagnosis is essential.