scr warmup

[Rawze]

(05-10-2023 )Mudflap77 Wrote:  Here is the regen history as requested.

I'm just not understanding why it would be going into SCR warmup when everything is hot. Like coming off the highway under load, parking and 30 seconds later it goes into SCR warmup, or just going to high idle back to low idle it will start SCR warm up again and the SCR temps hadn't changed from when it finish the SCR warmup.
Also when driving while it was in SCR warmup it drove like $hit where as before I wouldn't even know if it was changing operating modes.

regen history looks ok to me at a glance.

What do you mean you don't understand?.. Those SCR and DPF canisters cannot function properly if they fall much below about 450-F or so. IT IS ABSOLUTELY NORMAL FOR THE ENGINE TO JUMP BACK AND FOURTH IN OPERATING MODES TO REGULATE THOSE AFTERTREATMENT COMPONENT TEMPS PROPERLY! ... They cannot convert the exhaust gasses .. and therefore it will not pass an EPA inspection unless those cans stay hot all the time.

THAT IS WHAT IT IS DESIGNED TO DO... Keep the temperatures up and within operating range so that they can convert the exh. gases properly.

-= Sounds to me like you are worried about it actually doing its proper job, and your regen history looks like it is doing its thing as well.

If you want it to switch modes less often, then I would suggest you invest in an exhaust wrap to help keep the temps up.