I was having the same problem but I wasn't getting a check engine light. What was happening was it also didnt want to go out of park after 5 mins it would release from part then it would not shift out of first gear. Chrysler just gave me the car back saying they couldn't figure it out. So i decided to figure it out my self after talking to a few people it had (jerry from let) narrowed it down to either the crank position sensor or the cam position sensor. so i checked the price of the crank sensor and found out at my auto parts it was only 56.00 so i picked it up and 2 hours latter (that dam six point bolt u can't see lol) its working perfectly no more problems no sounds perfect fit. So thanks to the people on this site for helping me figure it out.