C05C9

Brake Pressure Sensor Supply Circuit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

The brake system fault indicator lights up
Incorrect operation of ABS or ESP
Reduced braking performance
Loss of emergency braking assistance

Causes

Open or short circuit in the sensor power supply circuit
Brake pressure sensor malfunction
Wiring Harness Problems
Brake ECU malfunction
Corrosion or poor contact in connectors

How to Fix

Check the integrity of the sensor power supply circuit
Check the voltage at the sensor connector
Inspect the wiring harness for damage
Check connectors for corrosion and poor contact
Replace brake pressure sensor if necessary
Check and, if necessary, replace the brake control unit.

Related codes

C05CA C05CB C05CC