P0520 — Engine Oil Pressure Sensor/Switch Circuit Malfunction
Seen on: Heavy Truck
Engine Oil Pressure Sensor/Switch Circuit Malfunction. Common causes: Oil pressure sensor circuit fault.
Your code rides along, so nearby mechanics see the fault before they quote you.
How serious is it?
Caution. Limp to the next safe stop.
Most likely causes
- Oil pressure sensor circuit fault
- Wiring fault
- failed sensor
First moves (roadside)
- Check oil pressure with mechanical gauge
- compare to sensor reading
- replace sensor
FAQ
Engine Oil Pressure Sensor/Switch Circuit Malfunction. Common causes: Oil pressure sensor circuit fault.
Caution — Limp to the next safe stop.
The most common cause is: Oil pressure sensor circuit fault. Other possibilities include Wiring fault; failed sensor.
Limp to the next safe stop. When in doubt, get a qualified mobile diesel tech on the truck before continuing.
Find a mechanic or related guides
General diagnostic guidance for diesel engines (Cummins, Detroit, PACCAR, Volvo, Mack and more). Not a substitute for a scan-tool diagnosis on your specific truck.