P0193 — Fuel Rail Pressure Sensor Circuit High
Seen on: Heavy Truck
Fuel Rail Pressure Sensor Circuit High. Common causes: Open circuit or sensor failure.
Your code rides along, so nearby mechanics see the fault before they quote you.
How serious is it?
Serious. Power derate likely — plan to stop soon.
Most likely causes
- Open circuit or sensor failure
- Wiring corrosion
First moves (roadside)
- Measure sensor 5V reference
- check signal wire for open
FAQ
Fuel Rail Pressure Sensor Circuit High. Common causes: Open circuit or sensor failure.
Serious — Power derate likely — plan to stop soon.
The most common cause is: Open circuit or sensor failure. Other possibilities include Wiring corrosion.
Power derate likely — plan to stop soon. 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.