I have had my cobalt lt for less than a year have bout 18000 miles on it and i live in pa...this winter we hae had some days with 0 as being the hi temp. and my car started throwing a check engine like so i ignored it and one day i got on it to catch up to a rsx type s and in 2nd 3rd and 4th the car would not climb above 5000 rpms the check engine started flashing and then the car shut itself down now its been to the dealership 6 times in the past 2 months for this problem the have replaced alot of parts and bout 1/8 mile down the road the light comes back on also i have had my rotors warp 2 times within the past 8 months any1 have any advice on the motor problems.....

 

most likley an ignition control module

 

Damn your problems sound simular to the horror story I have been going through,have they replaced your injector(s) also

 

Have they replaced the ignition coils yet.
I think they might be a weak spot being located on top of the spark plugs under the cover.

 

they ended up replacing the valves,valves springs, and had to replace the intake cam, sooo far soooo good ill keep u updated...