Safe to driveTo the nearest safe stop
J1939 code SPN 94. Below — how the fault is worded at the factory by Foton, International, Renault Trucks and ZF AS-Tronic, and what the second half of the code (FMI) means in the standard.
FotonInternationalRenault TrucksZF AS-Tronic
| FMI 1 | Low fuel pressure |
| FMI 17 | Insufficient fuel pressure in Common Rail system |
| FMI 4 | Fuel Inlet Restriction Lamp |
| FMI 6 | Fuel Inlet Restriction Lamp |
| FMI 0 | Injection pressure above normal. Repair: Troubleshoot the injection system, check the sensor. |
| FMI 3 | Injection pressure sensor: open circuit, short to +5 V or to battery voltage. Repair: Check the sensor and the engine wiring (A 6, A 13, A 33). |
| FMI 4 | Injection pressure sensor, short to ground. Repair: Check the sensor and the engine wiring (A 6, A 13, A 33). |
| FMI 8 | ASR brake signal fault. Repair: Run the diagnostic check of the EBS unit. Check the programming. Switch the ignition off, switch it on again and repeat the test. If the fault persists, replace the control unit. |
| FMI 16 | Injection pressure sensor, supply voltage too high. Repair: Check the sensor, the EECU and the engine wiring (A 6, A 13, A 33). |
| FMI 18 | Injection pressure sensor, supply voltage too low. Repair: Check the sensor, the EECU and the engine wiring (A 6, A 13, A 33). |
ZF AS-Tronic uses its own fault numbering: the number in the table below is an internal ZF code, not a J1939 SPN. It matches the title of this page by digit only and means something different.
| FMI 8 | No CAN bus signal: "ASR brake control active" (EBC1 message). |
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.
This is an electrical fault: an open, a short or a bad contact in the sensor circuit. The value it measures is most likely fine. You can drive. But until the circuit is repaired this system runs blind and cannot warn you about a real failure.
That said, the manufacturer flags this code as critical — if in doubt, it is safer to stop and check on the spot.
Check the fuel filter and water trap, drain the water. In cold weather, suspect fuel waxing.
If the value really did go out of range, rather than a sensor circuit being broken, these normally light up after it:
They are not fixed separately — they go out together with this one. The list is deliberately short: only the links the reference is sure about.
Scanner threw several codes at once? Paste the whole list — we will show which one is the root cause and which ones simply followed.