AutoCodes – Generic – C12DC

C12DC Code - ABS Brake Boost Solenoid Valve Circuit Malfunction

Quick Answer

The brake boost solenoid valve is used to control the amount of brake fluid flow from the high pressure accumulator, which provides brake assist and an improved brake pedal feel. 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: C12DC indicates ABS Brake Boost Solenoid Valve Circuit Malfunction.
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 1,106

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 C12DC Description

The brake boost solenoid valve is used to control the amount of brake fluid flow from the high pressure accumulator, which provides brake assist and an improved brake pedal feel. The brake boost solenoid valve is an internal part of the brake pressure modulator.

OBDII Code C12DC - ABS Brake Boost Solenoid Valve Circuit Malfunction - AutoCodes.com — C12DC Code - ABS Brake Boost Solenoid Valve Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC C12DC?

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

How to Fix the DTC C12DC?

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 C12DC 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 C12DC code?

Need more information on how to fix the C12DC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C12DC code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C12DC Buick — ABS Brake Boost Solenoid Valve Circuit Malfunction
C12DC Cadillac — ABS Brake Boost Solenoid Valve Circuit Malfunction
C12DC Chevrolet — ABS Brake Boost Solenoid Valve Circuit Malfunction
C12DC GMC — ABS Brake Boost Solenoid Valve Circuit Malfunction

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 C12DC Code

1. What does the OBDII code C12DC mean?

C12DC indicates a malfunction in the ABS Brake Boost Solenoid Valve Circuit, which can affect the performance of the anti-lock braking system (ABS).

2. What are the common symptoms of the C12DC code?

Common symptoms include the ABS warning light being illuminated, reduced braking performance, and a possible loss of brake assist.

3. What causes the C12DC code to appear?

Causes can include a faulty brake boost solenoid valve, damaged wiring or connectors in the solenoid circuit, or issues with the ABS control module.

4. Can I drive with the C12DC code active?

Driving with the C12DC code is not recommended, as it may compromise braking performance and increase the risk of an accident.

5. How is the C12DC code diagnosed?

A technician will scan the vehicle with an OBDII scanner, inspect the solenoid valve circuit for damage, and test the solenoid valve and ABS module for proper functionality.

6. How do I fix the C12DC code?

Repairs may involve replacing a faulty brake boost solenoid valve, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the ABS control module.

7. What tools are needed to diagnose the C12DC code?

Tools commonly used include an OBDII scanner, a multimeter for testing electrical circuits, and a wiring diagram for the ABS system.

8. Can a low brake fluid level cause the C12DC code?

While low brake fluid may not directly cause this code, it can contribute to ABS-related issues, so checking fluid levels is always a good idea.

9. How much does it cost to repair the C12DC code?

Repair costs vary depending on the issue but typically range from $150 to $600, depending on whether the solenoid valve, wiring, or ABS module needs replacement.

10. Can a software update fix the C12DC code?

In some cases, a software update for the ABS control module may resolve the issue, but mechanical or electrical repairs are often required.