no, the check engine light is not on and it does not pull any codes, sometimes though when I go to the store and turn the car off and when I come back and crank it, it will not crank and the the d4 light starts blinking, and I just keep trying to restart and then finally it starts and the d4 light goes out, sometimes it will crank up after 2-3 tries, but sometimes it will take 20min of trying to start it, and then the trans slips bad sometimes and sometimes you can not make it slip