OBD Guide
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C12E5

Brake Pedal Position Sensor Reference Circuit

C12E5 is an OBD-II diagnostic trouble code meaning: Brake Pedal Position Sensor Reference Circuit. Common causes: open or short circuit in the sensor wiring harness, oxidation of contacts of the brake pedal position sensor. Estimated repair cost: $56–167.

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

Symptoms

  • Incorrect operation of the ABS system
  • Activating the Check Engine Light
  • Difficulty braking
  • Loss of brake pedal sensitivity

Causes

  • Open or short circuit in the sensor wiring harness
  • Oxidation of contacts of the brake pedal position sensor
  • Mechanical damage to the sensor
  • Malfunction of the brake system control unit

How to Fix

  1. Checking the integrity of the wiring harness
  2. Diagnostics of the brake pedal position sensor
  3. Replace the sensor if necessary
  4. Diagnostics of the brake system control unit

Related codes

C癙5C1230C003A

FAQ

What does the C12E5 code mean?

C12E5 is an OBD-II diagnostic trouble code that indicates: Brake Pedal Position Sensor Reference Circuit

What causes a C12E5 error code?

The most common causes of C12E5 include: Open or short circuit in the sensor wiring harness; Oxidation of contacts of the brake pedal position sensor; Mechanical damage to the sensor; Malfunction of the brake system control unit.

How do I fix a C12E5 diagnostic trouble code?

To fix C12E5: Checking the integrity of the wiring harness. Diagnostics of the brake pedal position sensor. Replace the sensor if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C12E5?

Limited driving only, diagnose soon

How much does it cost to fix C12E5?

The estimated repair cost for C12E5 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat