P0090 OBD II Trouble Code Fuel Pressure Regulator 1 Control Circuit Open

Symptoms of P0090 OBD II Trouble Code

  • Delayed startup
  • Black smoke from the exhaust system
  • Diminished fuel efficiency
  • Engine drivability codes may also accompany a P0090

Common Causes of P0090 OBD II Trouble Code

  • Shorted or open wiring and/or connectors in the fuel pressure regulator control circuit
  • Defective fuel pressure regulator
  • Faulty fuel rail pressure sensor
  • Bad PCM or a PCM programming error

Severity of P0090 OBD II Trouble Code

Excessive fuel pressure can lead to a variety of drivability issues, as well as causing internal engine and catalytic converter damage. For this reason a code P0090 should be classified as severe.