P0523 — Engine Oil Pressure Sensor/Switch Circuit High Input
Seen on: Heavy Truck
Engine Oil Pressure Sensor/Switch Circuit High Input. Common causes: Oil pressure sensor signal high.
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 signal high
- Open circuit
- failed sensor
First moves (roadside)
- Check sensor circuit continuity
- replace sensor
FAQ
Engine Oil Pressure Sensor/Switch Circuit High Input. Common causes: Oil pressure sensor signal high.
Caution — Limp to the next safe stop.
The most common cause is: Oil pressure sensor signal high. Other possibilities include Open circuit; 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.