Error Code Guide
P0555
Low Severity
Brake Booster Pressure Sensor Circuit
Don't ignore this warning! Complete diagnostic guide to understand, diagnose, and fix this trouble code.
Step-by-step guide
Repair cost estimates
What does P0555 mean?
The P0555 diagnostic trouble code indicates: Brake Booster Pressure Sensor Circuit. This is a powertrain-related code that affects your vehicle's engine or transmission performance. When this code is triggered, the Engine Control Module (ECM) has detected a fault in the related system or component.
Common SymptomsWatch out for these warning signs
- Check Engine Light (CEL) illuminated
- Malfunction Indicator Lamp (MIL) on
- Erratic idle speed
- Speedometer malfunction
- Transmission shifting issues
- Cruise control problems
Possible CausesDiagnose from most to least common
- 1Faulty sensor
- 2Damaged sensor wiring or connector
- 3Corroded electrical connections
- 4Sensor out of calibration
- 5Open or short in wiring harness
- 6Poor electrical connection
- 7Damaged wiring insulation
- 8Faulty ground connection