My 03 Ram w/Cummins started acting up today, it ran fine this morning and after a 2 hr. trip it starting hesitating during and after engaging into gear. It did this very inconsistently and stalled once, but I was still able to drive home. And no sign of any problem at cruising speed. I checked for codes and there is nothing.

Does this sound like a throttle position sensor issue? Any other ideas? Thanks

 

Any suggestions out there? Thanks!