Safe to driveUntil the next service
J1939 code SPN 608. Below — how the fault is worded at the factory by International and Renault Trucks, and what the second half of the code (FMI) means in the standard.
| FMI 9 | J1587/1708 Datalink — J1708 (J1587) Switch Data Link Lost |
| FMI 8 | CAN bus fault — short to positive. Repair: Check the wiring (SL1/16, SL1/17). Check the wiring (SL1/16, SL1/17). Disabled by programming. |
| FMI 9 | CAN data bus fault: no communication with the instrument cluster |
| SPN 608 FMI 8608/8 · 608.8 | abnormal frequency or pulse width |
| SPN 608 FMI 9608/9 · 608.9 | abnormal update rate |
Safe to drive. Below — how much time you have and what happens if you keep going.
A standalone fault with no immediate consequences for driving.
Show the codes at the next service. If a second code from the same system appears, stop putting it off.
Scanner threw several codes at once? Paste the whole list — we will show which one is the root cause and which ones simply followed.