I received my DiabloSport tuner yesterday and it required a PCM calibration update. I installed one of the canned tunes without issue. Today I noticed that when turning my key to the ON position without starting, my check engine light flashes 10 times but goes away when starting the truck. No error codes are stored. Is this normal? My truck never did this before and it apparently started yesterday. it's a 2007 dodge ram 2500 HEMI

 

I have an 06 and also required a pcm update before using the diablosport. Did you update the pcm before installing the diablosport tune? I never saw what you are describing after installing any of the diablo tunes.

 

Strange, it's no longer happening. I went out to my truck on lunch break and the light is no longer blinking. Wonder if it's something where the trucks computer had to relearn a few things and cleared after a while.