Safe to driveTo the nearest safe stop
J1939 code SPN 1077. Below — how the fault is worded at the factory by Ford Trucks and Isuzu, and what the second half of the code (FMI) means in the standard.
Ford Trucks/Ecotorq writes fault numbers in its own format: the code in the table below is a Ford code (hexadecimal, zero-padded), not a J1939 SPN. It matches the standard only where the signal itself is standard, and usually matches the title of this page by digit alone.
| FMI 14 | Connector or wiring harness defective (short circuit between VPSx and vehicle electrical system and respectively VMGx/vehicle ground), IT-ECU defective |
| FMI 2 | CPU monitoring IC fault (P0606) |
| SPN 1077 FMI 21077/2 · 1077.2 | data erratic or intermittent |
| SPN 1077 FMI 141077/14 · 1077.14 | manufacturer-specific instructions |
Safe to drive. Below — how much time you have and what happens if you keep going.
Fuel is not arriving in the right amount or at the right pressure. It shows up first on climbs and under load.
You will most likely stall out on the road, and may not restart on the shoulder. A clogged filter or water in the tank you can nurse to a shop; a failing injection pump you cannot.
Check the fuel filter and water trap, drain the water. In cold weather, suspect fuel waxing.
Scanner threw several codes at once? Paste the whole list — we will show which one is the root cause and which ones simply followed.