Not all the time this happens but once in a while when the car gets started, 30% of the time the idle stays at 400 - 500 rpm and also it. Usually when you start your car, the idle goes up to 1200 - 1500 rpm and then goes back down to about 700 - 800 rpm. I brought it back to the dealer and they cannot find anything wrong. Does anyone have this problem.

2008 Acura TL - Auto (8000kms)