P0251 — Injection Pump Fuel Metering Control A
Seen on: Heavy Truck/Diesel
Injection Pump Fuel Metering Control A. Common causes: Failed fuel metering valve.
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
- Failed fuel metering valve
- Contaminated fuel
- wear
First moves (roadside)
- Perform flow test
- measure metering valve resistance 10-14 ohms
FAQ
Injection Pump Fuel Metering Control A. Common causes: Failed fuel metering valve.
Serious — Power derate likely — plan to stop soon.
The most common cause is: Failed fuel metering valve. Other possibilities include Contaminated fuel; wear.
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.