AutoCodes.com | All About OBDII Engine Codes
AutoCodes - Buick - C129B Buick

C129B Buick Code - Brake Pedal Position Sensor 3 Circuit High Input

- Code Popularity: 593 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
Share on Facebook   Share on Twitter   Share on Linkedin

What are the Possible Causes of the DTC C129B Buick?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Brake Pedal Position Sensor
  • Brake Pedal Position Sensor harness is open or shorted
  • Brake Pedal Position Sensor circuit poor electrical connection
  • Faulty Electronic Brake Control Module (EBCM)
⚠ Does your Buick have Safety Recalls? → Check here

How to Fix the DTC C129B Buick?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Search for C129B Buick Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C129B Buick code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Anti-Lock Brake System (ABS) Warning Light ON
  • Engine Light ON (or Service Engine Soon Warning Light)

Code C129B Buick Description

The Electronic Brake Control Module (EBCM) uses inputs from the electronic brake control brake pedal position sensor to determine when the brake is applied and how much force is used. The electronic brake control module monitors when the driver's foot is on the brake and locks the offset. The offset is locked when 3 out of the 4 inputs indicate the brake pedal is applied. The 4 inputs are brake pedal travel 1, brake pedal travel 2, master cylinder pressure sensor, and the brake pedal position sensor. These inputs are used to determine the driver's braking intent which is used to the control amount of pressure applied to the wheels.

OBDII Code C129B Buick - Brake Pedal Position Sensor 3 Circuit High Input - AutoCodes.com
C129B Buick Code - Brake Pedal Position Sensor 3 Circuit High Input

Need More Information on the Code?

Need more information on how to fix the C129B Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C129B Buick code diagnosed by a professional: Find a repair shop in your area

Code C129B Buick comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the C129B Buick code? Have you replaced any parts?
Any information is appreciated. Thanks