P1031 – VANOS Oil Pressure Fault (BMW)

Description

P1031 BMW indicates insufficient or unstable oil pressure for proper VANOS operation.

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Symptoms

  • Rough idle
  • Hesitation
  • Poor acceleration

Causes

  • Low oil pressure
  • Clogged oil passages
  • Faulty oil pump

Diagnosis

  • Check oil pressure
  • Inspect oil passages
  • Scan DME

Repair

  • Repair oil pump
  • Clean passages
  • Change oil