Safe to driveEnough to reach the yard
J1939 code SPN 105. Below — how the fault is worded at the factory by DAF, Dongfeng, Isuzu, KAMAZ, MAZ, Renault Trucks, SITRAK, YaMZ and ZF AS-Tronic, and what the second half of the code (FMI) means in the standard.
DAFDongfengIsuzuKAMAZMAZRenault TrucksSITRAKYaMZZF AS-Tronic
| FMI 0 | Intake air temperature F649 too high, engine protection active |
| FMI 2 | Intake air temperature F649 implausible (extended period) |
| FMI 3 | Intake air temperature F649 short to power supply at ECU pin A11 (extended period) |
| FMI 4 | Intake air temperature F649 voltage too low at ECU pin A11 (extended period) |
| FMI 10 | Intake air temperature F649 implausible temperature |
| FMI 15 | Intake air temperature F649 temperature too high |
| FMI 0 | Engine speed limitation caused by too high intake air temperature |
| FMI 2 | Incorrect intake air temperature signal. Scan tool code: P0096. Effect: Fan and warm-up control may misbehave. |
| FMI 3 | Short circuit to power or open circuit of the intake air temperature sensor |
| FMI 4 | Short circuit to ground of the intake air temperature sensor |
| FMI 10 | Intake air temperature signal not plausible (rate of change) |
| FMI 15 | Engine torque limitation caused by too high intake air temperature |
| FMI 3 | Boost temperature sensor fault (high voltage fault) (P1113) |
| FMI 4 | Boost temperature sensor fault (low voltage fault) (P1112) |
| FMI 0 | Intake air temperature sensor: physical range limit. K-line code on KamAZ-5490: MR2 11822. |
| FMI 1 | Intake air temperature sensor: physical range limit |
| FMI 3 | Intake air temperature sensor. K-line code on KamAZ-5490: MR2 11215. |
| FMI 4 | Intake air temperature sensor. K-line code on KamAZ-5490: MR2 11216. |
| FMI 12 | Intake air temperature sensor |
| FMI 0 | Charge air temperature sensor plausibility error - Plausibility error. Blink code: 6-1-2. Repair: Check the charge air temperature sensor and its wiring. |
| FMI 1 | Charge air temperature sensor plausibility error - Plausibility error. Blink code: 6-1-2. Repair: Check the charge air temperature sensor and its wiring. |
| FMI 3 | Air temperature sensor circuit fault - Voltage above allowed. Blink code: 2-3-3. Power will be reduced. Repair: Check the air temperature sensor and its wiring. |
| FMI 4 | Air temperature sensor circuit fault - Voltage below allowed. Blink code: 2-3-3. Power will be reduced. Repair: Check the air temperature sensor and its wiring. |
| FMI 12 | Air temperature sensor circuit fault - CAN bus signal implausible. Blink code: 2-3-3. Power will be reduced. Repair: Check the air temperature sensor and its wiring. |
| FMI 15 | EGR cooler fault - Implausibility error. Blink code: 6-1-9. Repair: Check the EGR cooler. |
| FMI 2 | Battery voltage too low. Repair: Check the voltage on the control unit pins (X1A/1, X1A/4, X1A/5, X1A/16, X1A/17). Switch the ignition off, switch it on again and repeat the test. If the fault persists, replace the control unit. |
| FMI 3 | Intake air temperature sensor — short to positive (5 V or battery voltage). Repair: Check the sensor and the wiring (J 1/15, J 1/35, J 1/36). Check the sensor and the engine wiring (A 2, A 19). |
| FMI 4 | Intake air temperature sensor — short to ground. Repair: Check the sensor and the wiring (J 1/15, J 1/35, J 1/36). Check the sensor and the engine wiring (A 2, A 19). |
| FMI 5 | Intake air temperature sensor — open circuit. Repair: Check the sensor and the wiring (J 1/15, J 1/35, J 1/36). Check the sensor and the engine wiring (A 2, A 19). |
| FMI 0 | Charge air temperature after intercooler above torque limit class 2 |
| FMI 2 | Implausible charge air temperature signal after the intercooler. Scan tool code: P0096. Effect: Fan and warm-up control may misbehave. |
| FMI 3 | High voltage on charge air temperature sensor (after intercooler) |
| FMI 4 | Low voltage on charge air temperature sensor (after intercooler) |
| FMI 15 | Charge air temperature after intercooler above torque limit class 1 |
| FMI 16 | Charge air temperature after the intercooler above the upper limit. Scan tool code: P007A. Effect: Fan and warm-up control may misbehave. |
| FMI 18 | Charge air temperature after the intercooler below the lower limit. Scan tool code: P007A. Effect: Fan and warm-up control may misbehave. |
| FMI 19 | Charge air temperature signal error on the CAN bus. Scan tool code: P0099. Effect: Fan and warm-up control may misbehave. |
| FMI 0 | Charge air temperature sensor signal plausibility error (Plausibility error). Blink code: 6-1-2. Repair: Check the charge air temperature sensor and its wiring. |
| FMI 1 | Charge air temperature sensor signal plausibility error (Plausibility error). Blink code: 6-1-2. Repair: Check the charge air temperature sensor and its wiring. |
| FMI 3 | Air temperature sensor circuit fault (Voltage above allowable limit). Blink code: 2-3-3. Power will be reduced. Repair: Check the air temperature sensor and its wiring. |
| FMI 4 | Air temperature sensor circuit fault (Voltage below allowable limit). Blink code: 2-3-3. Power will be reduced. Repair: Check the air temperature sensor and its wiring. |
| FMI 12 | Air temperature sensor circuit fault (CAN bus signal implausible). Blink code: 2-3-3. Power will be reduced. Repair: Check the air temperature sensor and its wiring. |
| FMI 15 | EGR cooler faulty (Plausibility error). Blink code: 6-1-9. Repair: Check the EGR cooler. |
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 2 | Vehicle on-board electrical system voltage too low. |
Safe to drive. Below — how much time you have and what happens if you keep going.
Boost is not reaching its target: turbo, intercooler or intake. The engine compensates with mixture and runs hotter than usual.
You will lose pull, burn more fuel and add overheating on long climbs. If you hear a whine or a whistle from the turbo, stop — the wheel is breaking up.
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.
Inspect the air filter and charge-air hoses: leaks and cracks produce exactly these codes.
Scanner threw several codes at once? Paste the whole list — we will show which one is the root cause and which ones simply followed.