P0094 — Fuel System Leak Detected - Small
Seen on: Heavy Truck/Diesel
Fuel System Leak Detected - Small. Common causes: Small fuel system leak detected.
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
- Small fuel system leak detected
- Micro-crack in HP line
- beginning injector wear
First moves (roadside)
- Inspect HP lines carefully
- measure injector return flow balance
- replace suspect injectors
FAQ
Fuel System Leak Detected - Small. Common causes: Small fuel system leak detected.
Serious — Power derate likely — plan to stop soon.
The most common cause is: Small fuel system leak detected. Other possibilities include Micro-crack in HP line; beginning injector 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.