C05B3

Brake Booster Temperature Sensor C Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Hard brake pedal
Increased braking distance
The brake system fault indicator lights up
Activating emergency brake mode

Causes

Brake booster temperature sensor malfunction
Broken or damaged wiring harness
Short circuit in the sensor circuit
Problems with contacts or connectors
Brake booster malfunction

How to Fix

Check the integrity of the wiring harness and contacts
Check the resistance of the brake booster temperature sensor (circuit C)
Inspect connectors for corrosion or damage
If necessary, replace the temperature sensor
Check the operation of the brake booster
Reset the error and check if it returns

Related codes

C05B1 C05B2 C05B4 P0571 P0572