What does code P0520 mean and is it safe to drive?
P0520: Engine Oil Pressure Sensor/Switch Circuit Malfunction. Here’s what it means, what usually causes it, what repairs typically cost, and how urgent it is to keep driving.
PowertrainDrive with caution
Repair cost
$120–$500
System
Powertrain
Urgency
high
What this code means
The PCM has detected an electrical fault in the oil pressure sensor circuit. This may trigger the oil light even if pressure is normal.
Common causes
- Failed oil pressure sensor
- Wiring short or open in sensor circuit
- Rarely, actual low oil pressure
Symptoms
- Check Engine Light
- Oil pressure warning light may flicker or stay on
- Possible ticking/knocking if real low pressure is present
Typical fixes
- Verify actual oil pressure with a mechanical gauge
- Replace oil pressure sensor
- Repair wiring/connectors
Repair cost range
Repairs for P0520 often fall between $120 and $500, depending on the cause and your vehicle.