P0520High urgency
Engine Oil Pressure Sensor/Switch Circuit Malfunction
Engine · Lubrication
⛔ Fix immediately — oil pressure monitoring is critical to prevent engine damage.
What this means
The engine oil pressure sensor or switch circuit has a general electrical fault.
Likely causes
- Failed oil pressure sensor/switchMost common
- Wiring harness damage to sensorCommon
- Low actual oil pressure (check oil level first)Common
- Faulty ECMLess common
Estimated repair cost
Oil pressure sensor replacement$75 – $200
Wiring repair$75 – $250
Oil pump replacement (if pressure actually low)$400 – $1,200
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Frequently asked questions about P0520
What does P0520 mean?
The engine oil pressure sensor or switch circuit has a general electrical fault.
Is P0520 serious?
Fix immediately — oil pressure monitoring is critical to prevent engine damage.
How much does it cost to fix P0520?
Repair costs for P0520 range from $75 – $200 depending on the root cause and your vehicle.
Can I drive with P0520?
No — this code indicates a serious issue. Stop driving and have the vehicle inspected immediately.