C05B4

Brake Booster Temperature Sensor C Circuit High

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
Disabling Brake Assist

Causes

Brake booster temperature sensor malfunction
Short circuit in the sensor circuit
Broken or damaged wiring
Problems with sensor connectors
Malfunction of the brake system control unit

How to Fix

Check the integrity of the sensor wiring and connectors
Measure the sensor resistance (compare with nominal values)
Check the voltage in the sensor circuit
If necessary, replace the brake booster temperature sensor
Reset the error and check if it returns

Related codes

C05B3 C05B5 C05B6