P0520 Engine Oil Pressure Sensor/Switch Circuit

Powertrain Severity: High Generic OBD-II

Fault in the oil pressure sensor or switch circuit.

Common causes

  • Faulty sensor or switch
  • Wiring damage
  • Real low oil pressure

Symptoms

  • Oil pressure warning
  • Check engine light

What to check

  1. Check oil level immediately
  2. Verify pressure with a mechanical gauge
  3. Inspect sensor wiring

Manufacturers may add their own detail to generic codes. If your vehicle shows a different description for P0520, follow the service information for that make and model.