OBD Codes List

Diagnostic reference · P0522

P0522

Engine Oil Pressure Sensor/Switch A Low

System
Speed and idle control (P code)
Lamp
Check Engine Light
Category
Powertrain - Computer and Auxiliary Controls

What it means

P0522 means Engine Oil Pressure Sensor/Switch A Low.

Where it lives

For P0522, the part to look at first is the sensor named here.

Check these first

  • Worn bearings or pump causing low oil pressure
  • Low oil level or wrong viscosity
  • Clogged pump pickup
  • Faulty oil pressure sensor
  • Shorted sensor wiring

What to do next

  1. Stop driving until oil pressure is verified with a gauge
  2. Check oil level, condition, and grade
  3. Install a mechanical gauge to measure true pressure
  4. Inspect the pump pickup screen if pressure is truly low
  5. Replace the sensor only if gauge pressure is correct

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Updated

Generic SAE J2012 definition. Last updated 2026-08-30.