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.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Sensor failed (low)Common
- Signal shorted to groundPossible
Parts involved
- Oil Pressure Sensor
- Sensor Wiring
P0522 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.