Why do I have to push the clutch pedal to the floor before a regen?

The computer has to see that the clutch pedal is disengaged. Same reason for the brake valves being pushed in then released. Otherwise it will not start the regen for safety reasons because the computer revs up the engine

 

Basically so a someone doesn't send their truck through a wall.

Same reason they say not to do a regen on top of a leaf pile or in a grassy field.

Cause we have to have cups warning people that coffee is hot. Lol

 

Just don't slack off on doing your parked regens if you do a lot of stop and go driving where the truck will not perform the auto regen while you're on the highway.

It causes all sorts of issues with the emission systems (mainly the dpf filter) which means downtime and $$$$ to fix.

 

It's a safety assumption that you won't have the truck in gear if you are in neutral and sitting on the clutch brake. You'd think the brakes being set would be enough, but maybe someone managed to 'outsmart' the system.