You previously posted a message about the diagnostic trouble code P1400--cold start emissions reduction control system. My 09 2500 HD 6.0 gas has been having a very rough idle every morning and the ck engine light comes on. I check and then clear the code every evening and the process repeats itself the next day.
I have gone over and over the intake system and cannot find anything wrong.
Any suggestions? HELP!
I have gone over and over the intake system and cannot find anything wrong.
Any suggestions? HELP!