P0522
Engine Oil Pressure Sensor/Switch A Low
Engine oil pressure sensor
Generic OBD-II
High
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.
High
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.
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?+
Only after you've confirmed oil pressure is actually normal. If it's genuinely low, stop driving immediately — low oil pressure can ruin the engine in minutes. If it's just the sensor, it's safe.
Can I just clear P0522?+
Don't clear it until you've verified real oil pressure. Clearing a code that reflects genuine low pressure could lead to catastrophic engine damage.
Related codes
Often seen with P0522
Read & clear P0522 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX