Gladiator throwing code sercive def

[Gladiator 2021]

This is the third time my 2021 gladiator has gave message service def truck will not start in 200 miles. After that is stated the count down on mileage. I take it in to dealer it has the same 2 p codes p20c6 and p208b that they clear. The first time was at 400 miles. 2nd at 600 and the third at 1500 miles. Dealership only has 1 diesel mechanic so waiting for them to dig into the problem. This is very frustrating anyone have any ideas?

 

[hfbroady]

This is the third time my 2021 gladiator has gave message service def truck will not start in 200 miles. After that is stated the count down on mileage. I take it in to dealer it has the same 2 p codes p20c6 and p208b that they clear. The first time was at 400 miles. 2nd at 600 and the third at 1500 miles. Dealership only has 1 diesel mechanic so waiting for them to dig into the problem. This is very frustrating anyone have any ideas?

Any resolution to this problem??