OBD II Fault Code

  • OBD II P0559

OBD-II Code Powertrain Control Module (PCM) failure is defined as a Brake Booster Pressure Sensor Circuit Intermittent

The Brake Booster uses vacuum to make the brake pedal easier to depress when braking. The Brake Booster Pressure Sensor measures the amount of vacuum inside the brake booster. If the engine computer sees an implausible signal from the Brake Booster Pressure Sensor, code P0559 will be set.

Common Problems That Trigger the P0559 Code

  • Brake booster pressure sensor failure
  • Powertrain Control Module (PCM) failure
  • Wiring issue
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