How To Fix The Code P0555: Brake Booster Pressure Sensor Circuit
Does your Volkswagen have the fault code P0555 – Brake Booster Pressure Sensor Circuit after you’ve scanned it with an OBD-II Scanner? In this article, we will discuss what that fault code means, possible causes, and how to fix it! Are you more of a visual learner? Watch our video guide below!
The P0555 fault code typically indicates a problem in the brake booster pressure sensor circuit. The brake pressure sensor itself may be faulty; the connectors could be defective or corroded; the wires to the sensor may be damaged; or there is a problem with the Engine Control Module (ECM/ECU/PCM).
In addition to the P0555 fault code, you may see other related codes, such as P0556, P0557, P0558, and P0559. The brake booster pressure sensor monitors the engine vacuum available to the power brake booster; if the sensor is faulty, it could affect other systems.
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Although we will show you how to troubleshoot this problem on a VW, the Diagnostic Trouble Code (DTC) P0555 is a generic code. It can come in any make, including Acura, Fiat, Alfa Romeo, Nissan, Ford, Dodge, Pontiac, Chevrolet, Subaru, Hyundai, Honda, Volvo, Mercedes-Benz, and other makes. The repair procedure will be similar, but the sensor location will vary.
The brake booster pressure sensor circuit detects the vacuum for the power brake booster. The Engine Control Unit (ECU) controls the circuit, which uses the sensor to adapt braking power to various situations and adjust the available vacuum to assist in brake pedal operation.
Symptoms
- The brake light stays on or flashes.
- Check engine light stays on.
- The brake pedal is difficult to press
- The vehicle takes longer to stop.
Possible Causes
- Faulty brake booster sensor
- Cracked or damaged vacuum lines
- Corroded electrical connector
- Damaged wire harness to the sensor
- Faulty brake booster
- Faulty Engine Control Module (ECM)
Possible Solutions
- Replace the faulty brake booster sensor.
- Clean any corrosion built up around the sensor.
- Update, repair, or flash ECU / ECM / PCM.
- Replace damaged wires.
- Replace damaged hoses.
The power brakes use engine-generated vacuum to make slowing the vehicle and applying the brakes much easier. If the brake system has a problem and no vacuum is delivered to the brake booster, applying sufficient brake pressure may be much harder.
Code P0555 typically indicates an electrical circuit fault; the brakes still function, but without diagnosing the problem, it may be challenging to determine the cause.
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We hope you find the VW P0555 Code – Brake Booster Pressure Sensor Circuit guide helpful. Check these troubleshooting and repair guides for more help on your Volkswagen.
thanks a lot lm helped