Do not driveTo the nearest safe stop
J1939 code SPN 1188. Below — how the fault is worded at the factory by DAF, Dongfeng and SITRAK, and what the second half of the code (FMI) means in the standard.
| FMI 7 | Turbocharger wastegate valve mechanical fault |
| FMI 7 | Incorrect operation of the exhaust bypass (wastegate) valve |
| FMI 0 | Turbocharger position sensor voltage above the upper limit. Scan tool code: P2562. Effect: Torque may be limited. |
| FMI 1 | Turbocharger position sensor voltage below the lower limit. Scan tool code: P2562. Effect: Torque may be limited. |
| FMI 2 | Implausible turbocharger speed. Scan tool code: P2578. Effect: Torque may be limited. |
| FMI 3 | Turbocharger actuator circuit short to battery. Scan tool code: P0048. Effect: Torque may be limited. |
| FMI 4 | Turbocharger actuator circuit short to ground. Scan tool code: P0047. Effect: Torque may be limited. |
| FMI 5 | Open load in the turbocharger actuator circuit. Scan tool code: P0045. Effect: Torque may be limited. |
| FMI 6 | Over-temperature of the turbocharger actuator powerstage. Scan tool code: P0045. Effect: Torque limited, the engine may shut down. |
| FMI 8 | No turbocharger signal for too long: timer overflow. Scan tool code: P2578. Effect: Torque may be limited. |
| FMI 12 | Over-temperature of the turbocharger actuator powerstage. Scan tool code: P0045. Effect: Torque limited, the engine may shut down. |
Do not drive. Stop as soon as it’s safe to do so — don’t keep going.
The code is flagged critical: the manufacturer considers it unsafe to keep driving without checking.
This code alone cannot say what will fail next, so stop at the first safe opportunity and look at it on the spot.
That said, the manufacturer flags this code as critical — if in doubt, it is safer to stop and check on the spot.
Scanner threw several codes at once? Paste the whole list — we will show which one is the root cause and which ones simply followed.