P0557
Brake Booster Pressure Sensor Circuit Low Voltage
Generic code
Vehicle Speed and Idle Control System
High severity
Moderate repair
Free on OBD DashX
Want real-world data on P0557?
See which problems come with P0557, how often it shows up in other vehicles, and how to fix it — step by step.
- Real-world fix data
- How often it happens
- Step-by-step repairs
What P0557 means
- The fault code P0557 indicates that there is an issue with the brake booster pressure sensor circuit, indicating that the sensor is operating outside its expected range.
Possible symptoms
- Illuminated check engine light
- Reduced brake performance or poor brake pedal feel
- Difficulty braking or increased stopping distance
- Abnormal noise coming from the brake system
Possible causes
- Failed brake booster pressure sensor
- Corroded or damaged wiring or connectors in the circuit
- Faulty brake booster
- Failed power brake booster relay
Related parts
- Brake Booster Pressure Sensor: Brake Booster Pressure Sensor measures the pressure in the brake line that provides extra braking power. Problems lead to inefficient braking and may cause accidents
Possible solutions
- Replace the brake booster pressure sensor
- Check and repair any corroded or damaged wiring or connectors in the circuit
- Replace the brake booster if necessary
- Replace the power brake booster relay if necessary
Free on OBD DashX
P0557 on OBD DashX
Real-world causes, how often this code shows up, and the fix — step by step.
Open P0557 No sign-up needed · available in 10 languagesScan your own car
Read and clear fault codes, live data and service resets with the CaRPM app.