P0520 – Engine Oil Pressure Sensor/Switch Circuit
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Symptoms
- Low oil pressure warning
- Engine noise
- Rough idle
- Poor acceleration
- Check engine light
Causes
- Faulty oil pressure sensor
- Low oil level
- Oil pump issue
- Wiring issue
- Blocked oil passages
Diagnosis
- Check oil level
- Inspect wiring
- Test oil pressure sensor
- Check oil pressure
- Inspect pump
Repair
- Replace oil pressure sensor
- Refill oil
- Replace oil pump
- Repair wiring
- Clean oil passages
