C05B5

Brake Booster Temperature Sensor C Circuit/Open

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

Brake booster temperature sensor circuit open
Temperature sensor malfunction
Poor contact in the sensor connector
Short circuit in wiring harness
Problems with the ECU

How to Fix

Check the integrity of the wiring harness and connectors
Measure the resistance of the temperature sensor
Check the voltage in the sensor circuit
Replace temperature sensor if necessary
Clean connector contacts from corrosion
Reset the error and check if it returns

Related codes

C05B4 C05B6 C05B7