P0557 OBD II Trouble Code Brake Booster Pressure Sensor Circuit Low

How to quickly diagnose, repair, and info on causes and symptoms of a diagnostic code P0557 that indicates a low voltage condition in the brake booster pressure sensor circuit.

Symptoms of P0557 OBD II Trouble Code

  • Check Brake Light flashes when braking
  • Check Brake Light stays illuminated
  • An illuminated Service Engine Soon Light
  • Increased effort required to depress the brake pedal

Common Causes of P0557 OBD II Trouble Code

  • Defective brake booster pressure sensor
  • Worn or damaged vacuum lines
  • Corroded or damaged connector
  • Damaged or faulty wiring
  • Defective brake booster
  • Defective PCM

Severity of P0557 OBD II Trouble Code

The severity of this code varies based on the specific malfunction and the severity level will progress if not corrected in a timely manner. At some point the safety level of the vehicle could become an issue requiring immediate attention.