OBD Guide

C05C4

Brake Pressure Sensor F Missing Calibration

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

Symptoms

  • The brake system fault indicator is on
  • Loss of ABS/ESP functionality
  • Incorrect brake pressure readings

Causes

  • Calibration failed after replacing sensor
  • Software failure in the brake ECU
  • Mechanical damage to the pressure sensor
  • Problems with the sensor wiring harness

How to Fix

  1. Diagnose the brake system with a scanner
  2. Check the integrity of the sensor and wiring harness
  3. Perform pressure sensor calibration procedure
  4. If necessary, replace the faulty sensor
  5. Update ECU firmware (if required)

Related codes

Error C05C4 by Vehicle Brand