well I have a 2005 2.2 auto cobalt. the cel and traction control light are on. I tried the whole turn off and turn on but its still on. the trans is shifting very hard(like I have a b and m shift plus) im a lil worried since this is my DD and I work every day 7 days a week.

has anyone had similar issues?

 

Well not much I can tell you or anyone for that matter. There are 100s of reasons why this can happen, but the first step you need to take is find out what codes the computer is throwing. Get the code read at a place like autozone or any other place that does it for free or buy a decent code reader. When you find out what codes they are post them up.

 

check your maf. i know when i installed my CAI, i forgot to plug the MAF back in, it threw a cel, TC light and when i put my car in gear it would engage very roughly

 

ccodes
p0036
P0030
P0443
P0102

 

Have you done any mods or anything here recently?

 

P0036 = HO2S Heater Control Circuit (Bank 1 Sensor 2)
P0030 = HO2S Heater Control Circuit (Bank 1 Sensor 1)
P0443 = Evaporative Emission Control System Purge Control Valve Circuit
P0102 = Mass Air Flow (MAF) Circuit Low Input

Question, how long ago did the CEL come on? And how long since it came on is the car running rough? At a glance it seems like your problem is the MAF sensor. Try cleaning it with some TB Cleaner or Brake Clean. Clean it, clear all the codes and then report back. Dont worry about the O2 sensor codes yet.

 

wwell I actually pulled off my CAI and put the stock bow on and put a brand new maf sensor on and there is still a prob. btw I have done a downpipes and catback. but it was in the beginning of summer and I haven't had a prob till two days ago