P0520 – Engine Oil Pressure Sensor/Switch Circuit

Description

The oil pressure sensor circuit is malfunctioning.

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Symptoms

  • Low oil pressure warning
  • Engine noise
  • Rough idle
  • Poor acceleration
  • Check engine light

Causes

  • Faulty oil pressure sensor
  • Low oil level
  • Oil pump issue
  • Wiring issue
  • Blocked oil passages

Diagnosis

  • Check oil level
  • Inspect wiring
  • Test oil pressure sensor
  • Check oil pressure
  • Inspect pump

Repair

  • Replace oil pressure sensor
  • Refill oil
  • Replace oil pump
  • Repair wiring
  • Clean oil passages

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