OBD codes / P0521
P0521
SeriousEngine Oil Pressure Sensor/Switch Range/Performance
Address promptly — can worsen or affect drivability.
Likely causes
- a failing component or sensor in this system
- wiring, connector, or control-module fault
Common fixes
- confirm the code with a scan tool and note any companion codes
- inspect the wiring and connector for the affected component
- run a diagnosis for your exact vehicle to pinpoint the cause
Seeing P0521 on your car? Get a diagnosis specific to your exact year, make and model.
Diagnose P0521 for my vehicleGeneric OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.