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P1523 – Engine Oil Pressure Too High

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Symptoms

  • Oil leaks
  • Engine noise
  • Check engine light

Causes

  • Stuck pressure relief valve
  • Blocked oil passage
  • Wrong oil viscosity

Diagnosis

  • Measure oil pressure
  • Inspect relief valve
  • Check oil type

Repair

  • Replace relief valve
  • Clean passages
  • Use correct oil
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