Do not driveTo the nearest safe stop
SPN 194 is a manufacturer number outside the standard J1939 table: different makes can put different things under it. Below — how it is worded by ZF AS-Tronic, and what the second half of the code (FMI) means.
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 0 | Both front-axle speed signal sources are missing. |
| SPN 194 FMI 0194/0 · 194.0 | data above normal range (most severe level) |
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.