In this video, I show you the exact location and replacement process for the Power Brake Booster Sensor (also known as the brake booster vacuum sensor) on a 2011-2016 Chevrolet Cruze (first-generation model). Knowing exactly where this sensor is mounted and the correct steps to safely swap it out is an essential part of troubleshooting your braking system, saving you time and keeping you organized before you disconnect any vacuum lines or wiring.
Common symptoms of a faulty Power Brake Booster Sensor include:
- A “Service Brake Assist” or StabiliTrak warning message illuminated on your dashboard, along with an active Check Engine Light.
- Diagnostic trouble codes (DTCs) stored in the module related to vacuum performance, such as P0556, P0557, or P0558 (Brake Booster Pressure Sensor Circuit range/performance).
- A noticeable change in brake pedal feel—such as a suddenly hard or stiff pedal—or intermittent loss of power braking assist, especially during cold starts or heavy engine load.
Safety First: The brake booster holds a critical vacuum charge that assists in stopping your vehicle. Always ensure the engine is completely turned off and the ignition is in the off position before starting. Pump the brake pedal several times with the engine off to deplete any residual vacuum inside the booster before removing the sensor. Protect your hands and eyes by wearing durable gloves and safety glasses, handle the plastic clips carefully so they don’t snap, and stay fully focused and attentive throughout the entire process.
As an experienced mechanic with a deep background in professional automotive repair and diagnostics, I am here to help you get your car’s braking system serviced right. If you run into any issues releasing the sensor from the rubber grommet or have questions about clearing the error codes after the install, just leave a comment below and I will help you out!