AutoCodes – Generic – C128C

C128C Code - ABS Regenerative Axle Pressure Sensor Offset Error

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: C128C indicates ABS Regenerative Axle Pressure Sensor Offset Error.
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 1,406

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 Sep 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C128C Description

OBDII Code C128C - ABS Regenerative Axle Pressure Sensor Offset Error - AutoCodes.com — C128C Code - ABS Regenerative Axle Pressure Sensor Offset Error

What does this mean?

What are the Possible Causes of the DTC C128C?

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

How to Fix the DTC C128C?

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 C128C 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 C128C code?

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Information for Specific Makes

C128C Buick — ABS Regenerative Axle Pressure Sensor Offset Error
C128C Cadillac — ABS Regenerative Axle Pressure Sensor Offset Error
C128C Chevrolet — ABS Regenerative Axle Pressure Sensor Offset Error
C128C GMC — ABS Regenerative Axle Pressure Sensor Offset Error

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 C128C Code

1. What are the common symptoms of OBDII code C128C (ABS Regenerative Axle Pressure Sensor Offset Error)?

- Common symptoms include the ABS warning light being illuminated on the dashboard, poor braking performance, and potential loss of ABS functionality.

2. What are the possible causes of OBDII code C128C?

- The code C128C can be caused by a fault in the regenerative axle pressure sensor, a wiring issue, or a malfunction in the ABS control module.

3. How can I diagnose the ABS regenerative axle pressure sensor offset error?

- Diagnosing this error typically involves using a professional OBDII scanner to read the code, conducting a visual inspection of the sensor and wiring, and performing a resistance test on the sensor.

4. Can I still drive my vehicle with the ABS regenerative axle pressure sensor offset error code present?

- It is not recommended to drive your vehicle with the ABS regenerative axle pressure sensor offset error present, as it can affect the performance of your anti-lock braking system.

5. How can I repair OBDII code C128C?

- Repairing this code may involve replacing the faulty regenerative axle pressure sensor, repairing any damaged wiring, or reprogramming the ABS control module.

6. Will the ABS regenerative axle pressure sensor offset error code reset on its own?

- The code may reset on its own if the underlying issue is intermittent, but it is recommended to diagnose and repair the problem to prevent it from recurring.

7. How much does it typically cost to repair OBDII code C128C?

- The cost of repairing OBDII code C128C can vary depending on the cause of the issue, but it may range from a few hundred to a thousand dollars, including parts and labor.

8. Can I clear the ABS regenerative axle pressure sensor offset error code without fixing the issue?

- While you can clear the code with an OBDII scanner, it is crucial to address the underlying problem to ensure the safety and proper functioning of your vehicle's braking system.

9. Is the ABS regenerative axle pressure sensor offset error a common issue in certain vehicle makes and models?

- This error code can be more prevalent in vehicles with regenerative braking systems or specific ABS configurations, but it can occur in various makes and models.

10. How often should I have my ABS system inspected to prevent OBDII code C128C from occurring?

- It is recommended to have your ABS system inspected as part of regular maintenance checks or whenever you notice any unusual braking behavior to prevent issues like the regenerative axle pressure sensor offset error.