Safe to driveUntil the next service
J1939 code SPN 551. Below — how the fault is worded at the factory by Renault Trucks, and what the second half of the code (FMI) means in the standard.
| FMI 11 | Fuel filter clogged (check the contact and the wiring). Repair: Replace the fuel filters. |
| SPN 551 FMI 11551/11 · 551.11 | root cause not known |
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.