P0521
Engine Oil Pressure Sensor/Switch Circuit Range/Performance
Generic code
Vehicle Speed and Idle Control System
High severity
Hard repair
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What P0521 means
- The fault code P0521 indicates that there is an issue with the range or performance of the circuit that controls the engine oil pressure sensor or switch. This may cause the engine to run poorly or not start at all.
Possible symptoms
- Illuminated check engine light
- Poor engine performance
- Engine may not start
- Abnormal engine noises
- Low oil pressure warning light may illuminate
Possible causes
- Low engine oil pressure
- Faulty engine oil pressure sensor or switch
- Damaged or corroded wiring or connectors in the circuit
- Failed engine control module (ECM)
Related parts
- Engine Oil Pressure Sensor: Engine oil pressure sensor measures the pressure of the engine oil. This car's pressure sensor is malfunctioning which will lead to engine not starting or rough running
Possible solutions
- Check and correct any low engine oil pressure issues
- Replace the engine oil pressure sensor or switch
- Repair any damaged or corroded wiring or connectors in the circuit
- Replace the engine control module (ECM) if necessary
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P0521 on OBD DashX
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