Question about 2005 Chevrolet Cobalt

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Chevy cobalt check engine light is on

My 2005 chevy cobalt check engine light just came on. now the engine bogs down and it will not change gears.. it sounds like the transmission. where can i find the transmission fluid. my husband looked and we cannot locate the area on the engine. the car didn't come with an owners manual. any help would be great.

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  • shacan Dec 06, 2008

    same problem, I have automatic. Chevy dealership could even help, they charged me for a sensor and car wouldnt go next day. It seems like the emergency brake is up and wontm change gear. Ive found I have a brake problem. The brakes are locking up and sticking causing it to seem like transmission. I got brake line replaced (was told fluid not leaking into caliber.had to order from chevy). No more changing gear problems but now my brakes are screwed. Recently replaced master cylinder and rotors but car is cutting off now. My solution - get rid of it.

  • Anonymous Feb 01, 2009

    I have a 2005 Chevy Cobalt 2.2L, Manual transmission with around 98,000km on it. My engine light came on and "Engine power reduced" started flasing. I then had very little power, I down shifted and still....very little power. Then my exhaust started to backfire. I pulled over and turned it off. Checked under the hood, everything looked fine. Lots of oil, coolant, clean air filter, and of course lots of fuel. I started it back up with no probelms. As I start from stop lifting the clutch I have to put the gas all the way to the floor so it won't stall. It won't rev past 3000 RPM's and about 60 kph. I'm pretty good with cars but this is puzzling me of whats wrong. Anyone have any ideas or same problems? Thanks.

  • kellyraew Mar 03, 2009

    I started up my 2005 Chevy Cobalt this morning and the check engine light came on. The check engine light comes on for short bits periodically, but is off most of the time, so I didn't think anything of it. About a mile from home, the ENGINE POWER REDUCED light came on, and all I could get was a top speed of about 30 mph. (My daughter said it did this to her once, but when I went out to start it the next day, the car was fine. I even took it to our mechanic, and nothing came up on the computer scan that time!) Any idea what it could be?

  • crulis Apr 01, 2009

    I had the same exact problem with my 2006 Cobalt.. the engine would reduce power or stall out. Then after a few minutes it would start and run fine. The check enging light would stay on for a little bit then go off. Needless to say that it did that for a few weeks then finally one day it stalled and wouldn't start. I had it towed to the dealer only to learn that my oil pump was bad and it fried the motor. My car only had 65,000 miles on it and I had to replace the engine. Now that my engine is replaced.. I have no heat, my stereo buttons do not work and the transmission shifts hard. I have to take it back to the dealer to find out why. We checked everything and can't figure it out.

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I think that this was a idiotic idea for them to do this the car has a closed case transmission meaning that there is no dip stick to check the fluid. what you do is at the side or back or the transmission you will see a bolt similar in to the design of a bolt on a oil pan. unscrew the bolt and if tranny fluid comes out you are fine if not add fluid until it comes out then put the bolt back in

Posted on Dec 11, 2014

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COULD BE FAULTY VECHICLE SPEED SENSOR. BUT HAVE VECHICLE CODE SCAN. YOUR VECHICLE TIME FOR TRANSMISSION FLUID CHANGE IF FLUID IS LOW. YOUR VECHICLE HAS A CHECK PLUG ON TRANSMISSION ADJACENT TO OIL PAN DRAIN PLUG. YOUR VECHICLE HAS TO BE LEVEL AND RAISED ON A CAR LIFT WITH ENGINE RUNNING WITH CHECK PLUG REMOVED. TRANSMISSION FLUID SHOULD DRIP OUT SLOW DRIP FLUID LEVEL GOOD.TRANSMISSION FLUID DRIPS OUT FAST TOO MUCH FLUID IN TRANSMISSION. IF NO FLUID DRIP OUT YOU NEED ADD PINT AT A TIME.IT MUCH SAFER TO LET A GARAGE CHANGE CHECK TRANSMISSION FLUID.WARNING THIS IS A DANGEROUS JOB TO DO YOUR SELF.VECHICLE NEED TO BE RAISED UP ON LEVEL HARD SURFACE.CAR SHOULD BE ON JACK STANDS.ENGINE NEED TO RUN UNTIL TRANSMISSION FLUID OPERATING TEMPERATURE REMOVE THE 11M OR 12M CHECK PLUG ON TRANSMISSION PUT DRAIN PAN UNDER TRANSMISSION. IF NO FLUID COME OUT ADD PINT AT A TIME. YOU POUR TRANSMISSION FLUID AT TOP TRANSMISSION AREA WHERE FILLER TUBE USE TO BE LOCATED REMOVE THE RED VENT FILL CAP.SCREW IT OFF USE A LONG LONG FUNNEL TO POUR FLUID IN TRANSMISSION. TO DO THIS JOB YOUR SELF NEED HELPER OR SOME BODY AROUND AT ALL TIMES BECAUSE ENGINE GOING TO BE RUNNING, YOU ARE GOING TO BE DIRECTLY UNDER THE CAR.WEAR LONG SLEEVE COVERALLS TO KEEP FROM GETTING BURN UNDER CAR.DONT PUT HAND OR ARMS NO WHERE NEAR THE CRANKSHAFT PULLEY WHILE ENGINE RUNNING.LIKE I SAY BE CAREFUL THIS JOB IS A DEALERSHIP JOB.

Posted on Oct 05, 2011

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I just had very similar problems with my 2005 Chevy Cobalt. It has 73,000 miles on it and my Fuel pump died. I had that replaced then it wouldnt change gears and the Speedometer didn't work. I took it to the dealer and found out my TCM had died as well. They replaced that now my check engine light is back on and is popping the code p0171 which means one engine bank is running lean (probably an oxegen sensor.)

Posted on Dec 03, 2010

There is no way you can check the transmission you must take it to the dealer.that is what i was told

Posted on Sep 04, 2008

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