Safe to driveTo the nearest safe stop
J1939 code SPN 174. Below — how the fault is worded at the factory by Foton, Isuzu, KAMAZ, MAZ, Renault Trucks, SITRAK, YaMZ and ZF AS-Tronic, and what the second half of the code (FMI) means in the standard.
FotonIsuzuKAMAZMAZRenault TrucksSITRAKYaMZZF AS-Tronic
| FMI 3 | Oil pressure sensor fault. Scan tool code: P0183. Effect: Fan and warm-up control may misbehave. |
| FMI 3 | Fuel temperature sensor fault (high voltage fault) (P0183) |
| FMI 4 | Fuel temperature sensor fault (low voltage fault) (P0182) |
| FMI 3 | Fuel temperature sensor. K-line code on KamAZ-5490: MR2 11115. |
| FMI 4 | Fuel temperature sensor. K-line code on KamAZ-5490: MR2 11116. |
| FMI 3 | Fuel temperature sensor circuit fault - Voltage above allowed. Blink code: 2-1-5. Repair: Check the fuel temperature sensor and its wiring. |
| FMI 4 | Fuel temperature sensor circuit fault - Voltage below allowed. Blink code: 2-1-5. Repair: Check the fuel temperature sensor and its wiring. |
| FMI 3 | Fuel temperature sensor, short to positive. Repair: Check the sensor and the wiring (J 1/26, J 1/28). |
| FMI 4 | Fuel temperature sensor, short to negative. Repair: Check the sensor and the wiring (J 1/26, J 1/28). |
| FMI 5 | Fuel temperature sensor, open circuit. Repair: Check the sensor and the wiring (J 1/26, J 1/28). |
| FMI 2 | Implausible fuel temperature sensor signal. Scan tool code: P0181. Effect: Power limited, the engine runs unevenly. |
| FMI 3 | Fuel temperature sensor voltage above the upper limit. Scan tool code: P0183. Effect: Fan and warm-up control may misbehave. |
| FMI 4 | Fuel temperature sensor voltage below the lower limit. Scan tool code: P0182. Effect: Fan and warm-up control may misbehave. |
| FMI 15 | Fuel low-pressure sensor physical value above the upper limit. Scan tool code: P018A. |
| FMI 16 | Fuel low-pressure sensor voltage above the upper limit. Scan tool code: P018A. Effect: Power limited, the engine runs unevenly. |
| FMI 17 | Fuel low-pressure sensor physical value below the lower limit. Scan tool code: P018A. Effect: Power limited, the engine runs unevenly. |
| FMI 18 | Fuel low-pressure sensor voltage below the lower limit. Scan tool code: P018A. Effect: Power limited, the engine runs unevenly. |
| FMI 3 | Fuel temperature sensor circuit fault (Voltage above allowable limit). Blink code: 2-1-5. Repair: Check the fuel temperature sensor and its wiring. |
| FMI 4 | Fuel temperature sensor circuit fault (Voltage below allowable limit). Blink code: 2-1-5. Repair: Check the fuel temperature sensor and its wiring. |
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 signal from the kickdown switch. |
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.
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.