Safe to driveEnough to reach the yard
J1939 code SPN 3696. Below — how the fault is worded at the factory by International, and what the second half of the code (FMI) means in the standard.
| FMI 2 | Diesel Particulate Filter Regeneration Switch — Parked Regen Switch Error |
| FMI 5 | Diesel Particulate Filter Regeneration Switch — Open Circuit in Regen Switch Indicator Circuit |
| FMI 6 | Diesel Particulate Filter Regeneration Switch — Over current for Parked Regen Switch Indicator |
| SPN 3696 FMI 23696/2 · 3696.2 | data erratic or intermittent |
| SPN 3696 FMI 53696/5 · 3696.5 | current below normal or open circuit |
| SPN 3696 FMI 63696/6 · 3696.6 | current above normal or grounded circuit |
Safe to drive. Below — how much time you have and what happens if you keep going.
Urea dosing is interrupted and the ECU is counting. First the lamp, then a torque cut, then a forced crawl speed — the stages come in by engine hours, not all at once.
The truck will not die mid-highway, but the window shrinks with every running hour. Plan the repair now, not when the power is gone: an emulator or "deleting AdBlue" does not remove the problem, the codes keep stacking.
Fill the AdBlue tank. If it’s already full, the problem is dosing or reductant quality — you need a scanner.
Scanner threw several codes at once? Paste the whole list — we will show which one is the root cause and which ones simply followed.