Why does my car idle high when I start it up then idles low and high. on 2007 Chrysler Aspen

My chrysler aspen 2007 idles high when I start it up now matter when it is then when it idles down it seems like its idling low to normal almost like its going to cut off. I got it diagnosted but they say it might be a wire or sensor they don't really know but I can get an overall inspection for 180.00 dollars. Can anyone help?

by in Maple Valley, WA on November 14, 2012
3 answers 1 comment
ANSWER by on November 14, 2012
POSS IDLE AIR CONTROL VALVE GOING BAD CLEAN THROTTLE BODY 1ST AND SEE IF THAT HELPS
COMMENT by on November 15, 2012
Thanks for your help.I will see if this fixes the problem.
ANSWER by on April 17, 2013
have you found out the problem? mine is doing the same thing. i brought it in a year ago to dodge they replaced spark plugs and cleaned some things supposively for a hefty $1800 well now its back running high rpm's and theres a battery light on.
ANSWER by on December 11, 2014
Its ur tps sensor