Question about 2002 Saturn VUE

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2002 4cl vue service engine soon light on

I took back to dealership where I bought, and they did a diagnostic. They said they couldnt find anything specific, it could be that I just filled it up with gas. I told them I did, and they told me they shut off the light, so now I should be good. After one day, it came back on. Now it is starting to rev funny when idling. Also when started the other day it was shaking really hard, I had left the air conditioner on, and when I turned it off it stopped shaking. My husband just pointed out too that the key comes out of the ignition when it is running, that isnt suppost to happen right?

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I have the exact same problem it took awhile before I figured it out.This car requires the medium octane gasoline .The 87 octane gas causes the engine to run on the lean side and triggers the "service engine soon light".By putting in a higher octane gas (middle range 92 octane) the light won't come on.Or you can get your service mechanic to set a richer gas mix for your car,however you'll lose about 2-3 mpg .

Posted on May 20, 2009

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Posted on Jan 02, 2017

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Hello
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