P0521 OBD II Trouble Code Engine Oil Pressure Sensor/Switch Range/Performance DTC

Detailed troubleshooting and repair information a P0521 code which is an oil pressure problem with the engine. The cause could either be mechanical - not enough pressure, or electrical meaning the sensor or wiring.

Symptoms of P0521 OBD II Trouble Code

  • Oil pressure gauge reading low or high
  • Oil pressure indicator lamp illuminated

Common Causes of P0521 OBD II Trouble Code

  • Low oil level in the engine
  • Old dirty oil (overdue for an oil change)
  • Low oil pressure
  • Faulty wiring or connection/connector in the oil pressure sender circuit
  • Faulty oil pressure sender/sensor