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Posted on Dec 09, 2009
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The fuel light comes on and off after filling with gas

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Anonymous

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  • Master 631 Answers
  • Posted on Dec 09, 2009
Anonymous
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Joined: Jul 28, 2009
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More then likely you have a sending unit inside of the fuel tank going bad. Does you gas gauge also show empty when the fuel light comes on?

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How big of gas tank is on it. {gallon wise}. And the gage shows full when you fill it up then after you have about 2-4 gallons left it drops to below the yellow line. Light comes on. Why.

ok im trying to be a mind reader now!!! what car is it????
i can tell you why the light come's on,,,its to tell you you need to fill up with gass again? in the uk we call that light the "**** he*d's light" as people dont see it then they run out of gass! stupid "A" if you realy need to know how many galls it takes just fill it up when the light comes on,,not after you have ran out of gass!
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Hi! You definitely have a problem on the fuel float thats why the check engine light is coming out. Please replace the fuel float and you'll be good. HOpe this helps and have a good one!
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My check engine light came on on the right side, and then my fuel gage went bonkers. I was in park and the fuel gage went to empty. I turned off and then it took awhile to come back up to full. I filled up...

I hope you did not top it off because filing it up like that will wreck havoc on the evap system. The engine light should go away as the gas in your tank is used up, or it may take some time, but hopefully it goes away. Just next time you fill up don't top off when it clicks off thats it. Also make sure the gas cap is tight. A loose gas cap can make the check engine light come on. I am an emmission repair specialist, and deals with these crazy things sometimes lol.
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Check engine light comes on after refueling the vhicle. gauge doesn't read full, then it will. light goes out after a day or two.

Also, be sure to not over-fill the gas tank. When filling the tank, when it sounds full (you can hear gas gush up the filler neck) and when the filler clicks off the first time...don't be tempted to keep clicking more gas into the tank because over-filling can cause a variety of problems (including setting the light) and can eventually saturate/ruin the fuel vapor canisters.
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Could be a warning that your fuel pump may be going. The gas level monitor is controlled by a float in the gas tank. It is attached to the fuel pump attachments. It too is electronically controlled.
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