OBD Guide
ENFRDEESPT

C129C

Brake Pedal Position Sensor 3 Circuit Calibration

C129C is an OBD-II diagnostic trouble code meaning: Brake Pedal Position Sensor 3 Circuit Calibration. Common causes: incorrect sensor calibration after replacement, worn or damaged brake pedal position sensor. Estimated repair cost: $33–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • The check engine and stability control light is on
  • Reduced efficiency of the ESP/ABS system
  • Disabling the emergency braking system
  • Incorrect operation of cruise control
  • Problems with starting the start-stop system

Causes

  • Incorrect sensor calibration after replacement
  • Worn or damaged brake pedal position sensor
  • Problems with the wiring harness to the sensor
  • Corrosion or poor contact in connectors
  • Malfunction of the ABS/ESP control unit
  • Mechanical damage to the pedal assembly

How to Fix

  1. Diagnostics with a scanner to confirm the code
  2. Visual inspection of the sensor and wiring
  3. Checking sensor parameters in real time
  4. Performing a calibration procedure through diagnostic equipment
  5. Replacing the sensor in case of mechanical damage
  6. Repair or replace damaged wiring
  7. Cleaning connector contacts

Related codes

C129AC129BC129DC1200C1210

FAQ

What does the C129C code mean?

C129C is an OBD-II diagnostic trouble code that indicates: Brake Pedal Position Sensor 3 Circuit Calibration

What causes a C129C error code?

The most common causes of C129C include: Incorrect sensor calibration after replacement; Worn or damaged brake pedal position sensor; Problems with the wiring harness to the sensor; Corrosion or poor contact in connectors.

How do I fix a C129C diagnostic trouble code?

To fix C129C: Diagnostics with a scanner to confirm the code. Visual inspection of the sensor and wiring. Checking sensor parameters in real time. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C129C?

Limited driving only, diagnose soon

How much does it cost to fix C129C?

The estimated repair cost for C129C is $33–167. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat