P0521: Engine Oil Pressure Sensor/Switch Range/Performance
MediumPowertrainEngine Oil System
What does P0521 mean?
P0521 is a diagnostic trouble code indicating "Engine Oil Pressure Sensor/Switch Range/Performance". The sensor or component is providing readings, but they fall outside the expected operating range. The part may be degraded, contaminated, or experiencing intermittent issues affecting engine oil system performance.
Common causes
- Worn or contaminated engine oil system component
- Vacuum leak or intake air leak
- Clogged filter or restricted flow
- Intermittent electrical connection issue
What should you do?
Schedule a diagnostic appointment at your earliest convenience. The vehicle is generally safe to drive short distances, but the underlying issue should be addressed to prevent it from worsening.
Get a diagnosis for YOUR car
Code P0521 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.