What does P0522 mean?
The oil pressure sensor or switch reports engine oil pressure to the computer and the dash gauge or warning light.
The computer is seeing a signal voltage that is lower than the sensor should ever produce, so it is almost always an electrical problem rather than a mechanical one.
Codes are a starting point. They tell you which test failed, not which part to replace. Check for other stored codes and fix those in a sensible order.
Symptoms
- Check engine light
- Oil pressure gauge erratic or reading zero
- Oil warning light
Common causes
- Open in the 5 V reference wire
- Signal wire shorted to ground
- Unplugged or corroded connector
- Failed sensor
How to diagnose P0522
- With the key on, back-probe the connector: you should see about 5 V on the reference wire and a good ground (under 0.1 V drop).
- If reference and ground are good, check the signal wire for a short to ground with the connector unplugged.
- If the wiring checks out, the sensor itself is the likely fault.
- Check the oil level right away.
- Confirm real pressure with a mechanical gauge before replacing anything.
How to fix it
- Top up oil
- Replace the oil pressure sensor
- Repair wiring
- Repair the engine if real pressure is low
Estimated repair cost
Likely repairs for P0522 run from about $100 to $300, depending on the cause.
| Repair | Typical range (parts + labor) |
|---|---|
| Diagnostic fee (scan + testing) | $100 - $200 |
| Oil pressure sensor/switch | $100 - $300 |
These are rough US estimates for an independent shop in 2026, based on typical parts prices and standard labor times. Dealers, big trucks, luxury brands and high-cost areas often run higher. They are not quotes. Use the repair cost estimator to adjust for your vehicle.
How serious is P0522?
High severity
If the oil light is on, stop and check the oil level. Driving with real low oil pressure can wreck the engine in minutes.
P0522 FAQ
What does P0522 mean?
P0522 stands for "Engine Oil Pressure Sensor/Switch "A" Circuit Low". The oil pressure sensor or switch reports engine oil pressure to the computer and the dash gauge or warning light.
Can I drive with a P0522 code?
If the oil light is on, stop and check the oil level. Driving with real low oil pressure can wreck the engine in minutes.
How much does it cost to fix P0522?
It depends on the cause. The likely repairs for P0522 range from about $100 to $300 at an independent shop in the US, plus a diagnostic fee of roughly $100-$200. These are rough estimates; dealer prices and some vehicles run higher.
What is the most common cause of P0522?
The most common causes are: open in the 5 V reference wire; signal wire shorted to ground; unplugged or corroded connector.