Bought truck APR 2020. shipped to Hawaii Jan 2021. DPF filled and went into limp mode Apr 2021(est). Scheduled Dealer 2 months out. Finally got to dealer had to order new DPF. Replaced entire exhaust system minus the sensors and modules due to parts not being available. Sep 2022 finally got new sensors and modules. Before leaving hooked up Reader and the P2002 permanent code was still on so asked the tech to delete out. He hooked up his computer and didn't see the code. Showed it to him on my reader and he figured it would clear after the next cycle/Regen. It didn't. Got the Batteries disconnected and nulled for this 4 day and going to see if the computer held the code. If this doesn't work I'm hope you guys have a solution cause I'm out of tricks and the dealership doesn't seem to know what I'm talking about. Might just have to go the lemon route. 15k miles now and this problem started around 6k so been trying to fix it for over a year.