Question about 2004 Ford Taurus

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2004 taurus engine light on

At times the gas guage shuts down and it says comp error. could this be a reason the engine light stays on?

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Yes
have it scanned for codes

Posted on Nov 12, 2008

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It could be as simple as a loose fitting gas cap.
Turn the key on and off 3 times, on the 3rd time leaving it on.
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The most common reason for an engine light to come on is a bad oxygen sensor. There can be many reasons for the light to come on. Most auto stores will plug in an engine analyzer and read the engine codes for free. At that time, they can also turn off the light. The stores motivation for reading your codes is to sell you the parts to fix it. A bad oxygen sensor will allow the car to run normally , only your gas mileage may suffer. Anyway let the car tell you what is wrong with it.

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if the float gets stuck the guage will stay in that position, the guage gets the signal via the wire harnes, so check the electric circit.
A trick I used on one of my jeeps (I removed the guages ) I filled the tank, reset the trip odometer to zero, put a jeerycan and a couple gallons of gas in the jeep, then drove normaly a week or so till I ran out of gas. wrote down the mileage on the trip odometer. gerrycan gas got me to the gas station.
divided the mileage by half. I fill up the tank all the way the reset the trip odometer to zero, when I reach the half mileage of the tank I fill up again and repeat

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I found that my check engine light comes on when I fail to turn the gas cap two clicks. It has something to do with the air . After I paid $50 for one of those diagnostics, I always make sure when it comes on to check if my husband failed to click the gas cap, correct the problem and the check engine light goes out before I have to gas up the next time and will stay off as long as I am the sole driver.

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