Question about 2005 Chevrolet Cobalt

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2005 chevy cobalt check engine light

Car drove perfect last night. this morning trouble starting at first, then it started fine twice since then. the check engine light is blinking and it feels like i have no power when i step on the gas. the hood also appears to be rattling from the engine. I've had my car for about a year in a half and now my engine light keeps coming on. It started about a week ago when I fiilled my tank up with gas. Right after that my check engine light came on and it started running rough like it wanted to cut off. I let it sit over night and the next morning it cranked up perfectly fine without any problems. I took it 2 autozone and since the light wasn't on anymore they said they couldn't detect the problem. But now after a couple of days right after I put some more gas in my tank the same problem happened. I took it back to autozone and they said the computer detects a misfire so I need a major tune-up but the dealership says that if my car haven't reached 100,000 miles then I don't need a tune-up. It even cuts off and I'm scared 2 damage something major if I crank it again

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  • Richard Scordino May 11, 2010

    Sounds like either the vapor recovery system is malfunctioning or the cap is not on or sealing properly. (based on that it happens every time you get fuel) Could be an engine performance problem but I'd at least check out what I said.


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Make sure the gas cap is on tight. vapor recovery system depends on the closure of the gas cap. if that did not solve your problem, I would suggest to get a new gas cap first, before going to the dealer or any repair shop for a turn-up.

Posted on May 28, 2009

  • oceanview100 Nov 26, 2010

    can be spark plug dirt, need to be clean it or put a new spark plug, the engine light go off perfectly. I use my can OBD2 scanner. show this P0302-sensor-spark plug wires, so change the plugs
    good luck to you all and hope it works.


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2005 chevy cobalt check engine light

You need to get the computer scanned. This can be done at Auto Zone or similar parts stores free of charge. More than likely you will just need new spark plugs and/or plug wires but I cannot be certain without the engine code.
Hope this helps, remember to rate this answer.

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