Check Engine Codes / P0520
P0520 Code
Engine Oil Pressure Sensor Circuit Malfunction
What it means
The oil pressure sensor circuit is misbehaving. Usually the sensor — but confirming actual oil pressure matters, because the alternative is serious.
Can you keep driving?
If the oil pressure GAUGE/light shows a real problem, stop immediately. If it's just the code with normal pressure, drive carefully to the shop.
Common causes
Listed most-common first. Fix cost depends on which one it turns out to be — check your quote free below.
⚠️ Don't get ripped off
The right diagnostic is a mechanical oil pressure test to confirm the sensor is lying, not the engine. Skipping straight to engine work off this code alone is a giant red flag.
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Related codes
Informational only — codes share symptoms across vehicles, so proper diagnosis on your specific car always comes first.