cgss

on cold mornings my cobalt will idle super rough sometimes die, throwing the code P2135. this will happen until the engine is warmed up then it idles perfectly fine. any suggestions?

Coblasts

Check the connector for the throttle position sensors and maybe clean the connectors with contact cleaner and inspect for corrossion.

Bad05SS

check the Throttle position sensor, check and clean the connection look for loose wires , or you might need a new one

millermccullum

Hey Cgss.
Myself Millermccullum and I read your entire posting. Welcome to the forum Cgss. I have always thought that warming up engine while car in idle is best. But, the owner's manual says "in cold weather, don't warm up engine by letting car sit idle...warms up quicker in slow speed. Yes, it is nice to get going sooner and engine will warm up quicker by driving in slow speed, but, I prefer to do what's safest for the engine. Anyways Thanks. Stay Connected.