C0047

Brake Booster Pressure Sensor

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Increased brake pedal force
The brake system fault light comes on
Reduced braking performance
Unstable brake operation

Causes

Brake booster pressure sensor malfunction
Open or shorted wiring harness
Damage to the vacuum brake booster
Sensor connection problems

How to Fix

Check the integrity of the wiring harness to the sensor
Test the pressure sensor with a multimeter
Replace the sensor if a fault is detected
Check the vacuum booster for leaks
Reset the error and take a test drive

Related codes

C0045 C0046 C0048