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Engine Oil Pressure Sensor/Switch Circuit Malfunction on BMW

BMW

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1 source
  • Official data (NHTSA)official_feed

What P0520 means

Avoid long trips

The oil pressure sensor/switch circuit signal is malfunctioning. Always verify with a mechanical gauge before assuming a sensor fault — a genuine low-pressure condition on a worn engine must not be ignored.

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General information, not a diagnosis or repair instruction. Always confirm with a qualified mechanic for your specific vehicle.

Common causes

  • Engine Oil Pressure Sensor/Switch Circuit Malfunction

What to check first

  1. Verify actual oil pressure with a mechanical gauge
  2. Check oil level and condition
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