OBD-II Generic Error Code P0520: How to Fix It

Q: Can I drive with a P0520 code?

It is not recommended. P0520 indicates a potential oil pressure problem. Driving with low oil pressure can cause severe engine damage, including seized bearings or a thrown rod. Have the issue diagnosed and repaired as soon as possible.

Q: Will replacing the oil pressure sensor fix P0520?

Not always. While a faulty sensor is a common cause, P0520 can also be triggered by wiring issues, low oil level, or actual low oil pressure. Always diagnose thoroughly before replacing parts.

Q: How much does it cost to fix P0520?

Costs vary: a new oil pressure sensor is typically $20-$60, and labor at a shop can be $100-$200. If the oil pump needs replacement, costs can range from $500-$1500. DIY repair can be under $100 for parts.

Q: What are the symptoms of P0520?

Common symptoms include the check engine light on, oil pressure warning light illuminated, erratic oil pressure gauge readings, and possible engine noise (knocking or ticking) due to low oil pressure.

Q: Do I need a special OBD-II scanner for P0520?

A basic OBD-II scanner that reads and clears codes is sufficient. However, a scanner with live data can help monitor oil pressure sensor voltage during diagnosis.

Abstract

Error code P0520 indicates a problem with the engine oil pressure sensor circuit. This sensor monitors oil pressure to ensure proper engine lubrication. When this code appears, it means the Engine Control Module (ECM) has detected an abnormal voltage signal from the sensor or its circuit. Ignoring it can lead to serious engine damage due to low oil pressure.