P0523 – Engine Oil Pressure Sensor High Input

Description

The ECM detects a high voltage signal from the oil pressure sensor.

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Symptoms

  • Oil light on
  • High oil pressure reading

Causes

  • Open circuit
  • Faulty sensor
  • Wiring issues

Diagnosis

  • Monitor sensor voltage
  • Inspect wiring
  • Check oil pressure

Repair

  • Replace sensor
  • Repair wiring