Hello Everyone. New here in the Forum. Need help recently got my new to me 01 2500 on the road it would not shift into OD nor would it lock the converter. I took it to the shop that rebuilt the tranny and he took it for a road test and he said that all the parameters were within specs. I flashed the codes which were #122, #720, and #1693. Also the APPS was working on the road test and was within specs. He said the PCM said it was an 02 and I think the engine is an 01 would the two different computers cause this problem. Any thoughts or help would be appreciated.