Thread: 04 Grand Prix Check Engine/Running to cool

Well, let me first start by saying I wouldn't do anything, just bring it back to the dealership tomorrow. That being said, I believe you have two issues. Given the cold weather lately, if your car is driven and then turned off before it warms up, it could pop that code you described even if nothing is wrong. In fact, when it was -20F here my car did the same thing. The code will clear it self after a couple normal heat up cycles.

The other issue of it dying when it is warm could be any of several items. Considering the car has low miles I’m leaning towards a weak ignition coil. If the dealership comes up empty ask them to check the coils when they are warm.

Good luck.

the thermostats on the 04 models are strange. they are like a wax deal and when they go bad they allow the car to run too cold. they are fairly cheap. i would imagine there are two differnt issues. dunno about the stalling part, maybe the intake air temp sensor is bad. anyone with a scanner should be able to tell if the numbers jive. my 2000 grand prix is stalling at first start up but it doesnt matter if its cold or warm..i see no sensors at fault with my scanner so im lost right now....crank sensor????