Engine Oil Pressure Sensor/Switch A Low
What it means
P0522 means the engine oil pressure sensor circuit is reading an abnormally low voltage. Most often it's a faulty sensor or wiring rather than an actual oil problem, so the engine runs normally — but you must confirm real oil pressure with a mechanical gauge first, because true low oil pressure can destroy the engine quickly.
Can I keep driving? Be cautious — this is a sensor-circuit code, usually a wiring or sensor fault with the engine running fine, but confirm real oil pressure with a mechanical gauge first, because genuine low oil pressure can destroy the engine.
Real-world scan data
Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.
Common symptoms
What you'll notice
- Check-engine light on
- Oil-pressure warning light on, or the gauge reads low/zero
- Usually no change in how the engine runs (if it's only the sensor)
Common causes
Most likely first
- Faulty oil pressure sensor/sender — the most common causeLikely
- Wiring shorted to ground or an open in the sensor circuitCommon
- Corroded or loose sensor connectorCommon
- Genuine low oil pressure (low oil level or a failing oil pump) — must be ruled outLess often
- Faulty ECM (rare)Less often
How to diagnose & fix
Work through it in order
- First, check the oil level and confirm actual oil pressure with a mechanical gauge — never assume it's only the sensor.
- If real pressure is fine, inspect the sensor connector and wiring for a short to ground or an open.
- Clean or repair corroded connections.
- Replace the oil pressure sensor/sender if it tests faulty.
- Clear the code and verify the light stays off.
FAQ
Quick answers
Is it safe to drive with P0522?+
Can I just clear P0522?+
Related codes
Read & clear P0522 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.