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I just received these codes this Saturday and the CEL (check engine light) is now off. Coming home from work I decided to fill up and drove home. An hour later I started the Jeep and the CEL comes on. The Jeep will not allow me to shift from park. I turn it off and back on and everything is now fine but the CEL is still on. Took it to O'Reilly and had them pulled the codes. The scanner reviled the following 3 codes. P1DB8, U0422, and the same P1DB8??? Later that night the CEL turns off.

I will be taking the Jeep in for servicing and wanted to know if anyone else has experienced this. I did some research and could not get a straight answer on what these codes mean. Any help would be great, because I'm gearing up for some BS answer from the dealer. LOL
 

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I"t just happened to me this evening as wife and I were about to go out for dinner. Started my 2016 Eco Diesel GC and would not shift from park even with foot on brake, shut engine off and re-started CEL light came on and allowed me to shift down to drive. Used a generic scan tool and got P1DB8. After dinner CEL light was off. Anyone else have this issue, What year GC
 

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P1DB8 - Unintended Torque applied while in Neutral.

I had this happened one time several years ago in my 2014. Check engine light came on but it did not refuse to shift from Park. It later went out on its own. Dealership just said “maybe it caught a rev shifting out of park or neutral” and told me not to worry about it. It has never happened since then.
 
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