AutoCodes – GMC – C12BB GMC

C12BB GMC Code - ABS Regenerative Axle Pressure Sensor Erratic

Quick Answer

The Electronic Brake Control Module (EBCM) uses input from the regenerative axle pressure sensor for more accurate control during a brake and vehicle stability enhancement system event. 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: C12BB GMC indicates ABS Regenerative Axle Pressure Sensor Erratic.
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 922

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 C12BB GMC Description

OBDII Code C12BB GMC - ABS Regenerative Axle Pressure Sensor Erratic - AutoCodes.com — C12BB GMC Code - ABS Regenerative Axle Pressure Sensor Erratic

What does this mean?

What are the Possible Causes of the DTC C12BB 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 C12BB 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 C12BB 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.

Need more information about the C12BB GMC code?

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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 C12BB GMC Code

1. What are the common symptoms of OBDII code C12BB GMC (ABS Regenerative Axle Pressure Sensor Erratic)?

- Common symptoms include the ABS warning light coming on, issues with the vehicle's stability control system, and potential difficulties in braking.

2. What are the possible causes of OBDII code C12BB GMC?

- The code C12BB GMC can be triggered by faulty axle pressure sensors, wiring issues, sensor calibration problems, or issues with the ABS control module.

3. How can I diagnose OBDII code C12BB GMC?

- Diagnosis involves using an OBDII scanner to retrieve the code, inspecting the axle pressure sensors and their wiring, checking the sensor calibration, and testing the ABS control module.

4. Can I drive my vehicle with OBDII code C12BB GMC active?

- It is not recommended to drive the vehicle with an active C12BB GMC code as it can affect the ABS system's functionality and compromise your vehicle's safety.

5. How can I repair OBDII code C12BB GMC?

- Repair options include replacing the faulty axle pressure sensor, repairing any damaged wiring, calibrating the sensors, or replacing the ABS control module if necessary.

6. Are there any DIY tips for addressing OBDII code C12BB GMC?

- DIYers can start by checking the sensor wiring connections, ensuring they are secure and free of damage. However, for proper diagnosis and repair, it is recommended to consult a professional mechanic.

7. How much does it typically cost to fix OBDII code C12BB GMC?

- The cost of fixing OBDII code C12BB GMC can vary depending on the underlying issue, but it may range from a hundred to a few hundred dollars for parts and labor.

8. Can a faulty axle pressure sensor cause other issues in my vehicle?

- Yes, a faulty axle pressure sensor can lead to issues with the vehicle's stability control system, ABS functionality, and overall braking performance.

9. Is it important to address OBDII code C12BB GMC promptly?

- Yes, it is crucial to address OBDII code C12BB GMC promptly to ensure the proper functioning of the ABS system and maintain safe driving conditions.

10. How long does it take to repair OBDII code C12BB GMC?

- The repair time for OBDII code C12BB GMC can vary based on the specific issue, but it typically takes a few hours to a day for a professional mechanic to diagnose and repair the problem.