OBD Guide
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C129E

Brake Pedal Position Sensor 4 Circuit High Input

C129E is an OBD-II diagnostic trouble code meaning: Brake Pedal Position Sensor 4 Circuit High Input. Common causes: open or short circuit in wiring harness, faulty brake pedal position sensor. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Check Engine Light Is On
  • Problems with the ABS system
  • Unstable behavior of the ESP system
  • Problems with cruise control

Causes

  • Open or short circuit in wiring harness
  • Faulty brake pedal position sensor
  • Poor connection or corrosion in connectors
  • Problems with the ABS/ESP control module

How to Fix

  1. Check wiring harness for damage
  2. Check the sensor and control module connectors
  3. Replace the brake pedal position sensor if necessary
  4. Check and replace ABS/ESP control module if necessary

Related codes

C1298C1299C129AC129F

FAQ

What does the C129E code mean?

C129E is an OBD-II diagnostic trouble code that indicates: Brake Pedal Position Sensor 4 Circuit High Input

What causes a C129E error code?

The most common causes of C129E include: Open or short circuit in wiring harness; Faulty brake pedal position sensor; Poor connection or corrosion in connectors; Problems with the ABS/ESP control module.

How do I fix a C129E diagnostic trouble code?

To fix C129E: Check wiring harness for damage. Check the sensor and control module connectors. Replace the brake pedal position sensor if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C129E?

Limited driving only, diagnose soon

How much does it cost to fix C129E?

The estimated repair cost for C129E is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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