C056A

Brake Booster Pressure Sensor Power Supply Circuit

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine Light Is On
Deterioration in braking performance
Brake pedal dips
Unstable operation of the brake booster

Causes

Open or short circuit in wiring harness
Brake booster pressure sensor malfunction
Power or grounding problems
Computer malfunctions

How to Fix

Check the integrity of the wiring harness
Check the voltage and grounding of the sensor
Replace brake booster pressure sensor if necessary
Check the operation of the computer

Related codes

C056B C056C C056D