OBD Guide
ENFRDEESPT

C122A

Brake Booster Pedal Force Switch Circuit

C122A is an OBD-II diagnostic trouble code meaning: Brake Booster Pedal Force Switch Circuit. Common causes: open or short circuit in wiring harness, pedal force sensor malfunction. 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
  • Reduced braking performance
  • Unusual behavior of the brake pedal

Causes

  • Open or short circuit in wiring harness
  • Pedal force sensor malfunction
  • Problems with the electronic control system

How to Fix

  1. Check the wiring harness for damage
  2. Check the pedal force sensor for functionality
  3. Check connections and contacts in the circuit
  4. If necessary, replace the sensor or wiring harness

Related codes

C122BC122CC122D

FAQ

What does the C122A code mean?

C122A is an OBD-II diagnostic trouble code that indicates: Brake Booster Pedal Force Switch Circuit

What causes a C122A error code?

The most common causes of C122A include: Open or short circuit in wiring harness; Pedal force sensor malfunction; Problems with the electronic control system.

How do I fix a C122A diagnostic trouble code?

To fix C122A: Check the wiring harness for damage. Check the pedal force sensor for functionality. Check connections and contacts in the circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C122A?

Limited driving only, diagnose soon

How much does it cost to fix C122A?

The estimated repair cost for C122A is $56–167. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat