Safe to driveDrivable, but watch it yourself
J1939 code SPN 2623. Below — how the fault is worded at the factory by DAF, Dongfeng and Mercedes-Benz, and what the second half of the code (FMI) means in the standard.
| FMI 3 | Accelerator pedal F648 voltage too high at ECU pin B25 (position sensor 2) |
| FMI 4 | Accelerator pedal F648 voltage too low at ECU pin B25 |
| FMI 3 | Short circuit to power supply of accelerator pedal signal 2 |
| FMI 4 | Short circuit to ground or open circuit of accelerator pedal signal 2 |
| FMI 2 | 2-Channel Accelerator Pedal “in-range” fault (AP Ch1 and Ch2 values differ to much) |
| FMI 8 | 2-Channel Accelerator Pedal Signal 2 Missing |
Safe to drive. Below — how much time you have and what happens if you keep going.
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.
Scanner threw several codes at once? Paste the whole list — we will show which one is the root cause and which ones simply followed.