OBD-II reference

All 9.533 generic OBD-II codes, explained in detail.

Causes, inspection steps and sources — a comprehensive DIY archive. Created and maintained with love for the detail. Good luck and have fun!

Powertrain generic / SAE

P0522

Engine Oil Pressure Sensor/Switch Low Voltage

The oil pressure sensor signal is below the expected minimum. Often points to an electrical fault — short to ground or failed sensor — but can also indicate genuinely low oil pressure.

SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number5 / 22

Possible causes

  • Sensor failed (low) high
  • Signal shorted to ground medium

Inspection / repair

  • Difficulty: medium
  • DIY: possible
  • Estimated cost: 60–1500 €
  • Estimated time: 0.5–6 h
  • Component: oil pressure sensor
  • Component: sensor wiring
  • MIL / check engine light

Sources

References

How to read OBD-II codes

The first letter names the vehicle system, the second digit distinguishes generic from manufacturer-specific, the remaining digits group fault area and number.

PPowertrain: engine, transmission, emissions
BBody: chassis trim, comfort, interior
CChassis: suspension, brakes, steering
UNetwork: CAN, control modules, communication