Question about 2004 Chevrolet Cavalier
My 04 cavalier just started running rough this past Friday, the check engine light came on, checked the gas cap was not on right and put it on right and the light was off for a little while, now it is back on again and running rough in idle or when slowing down, also cruise control is working sometimes and sometimes it is not
A gas cap loose is not going to make it run bad. you wil need a qualified repair shop to ck that .
Posted on Sep 25, 2009
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Posted on Jan 02, 2017
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When the Check Engine light (or Service Engine Soon or small picture of an engine) is turned on, the systems computer control unit (called the PCM) has sensed a fault in the electronic controls of the engine and/or the emission system. When this happens you will seldom feel the car engine run any different. There are about 200 possible system faults (the gas cap is just one of them) that turn the Check Engine light on, to know what has developed a problem you must have the system tested, this is called an OBD2 fault code test, Kragen/Oriley and Autozone parts stores (USA only) do this testing for free.
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