Question about 2005 Chevrolet Equinox

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Check engine litgh came on recently after i discover the gas cap was not tight

I would to know what may the problem

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You need to have it code scanned before we can help you there are over 4500 codes that it could be get a free scan at an auto parts store

Posted on Jul 19, 2008

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If the code would have been due to the cap problem then the code will go away. Try resetting the code. Also try diagnosing again after disconnecting the battery and then reconnecting it after a few minutes.

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My check engine light is on. I discovered that my gas cap was not on correcty could that have caused the problem? and if so how do I reset it. I had my car check when I got my inspection and oil change...


You can actually throw a fault signal by not having gas cap on, or even tight. People who pump gas while car is running often throw a evap code, check the parts store and see if they have a scanner, they usually let you use it for free, just hook it up to your car, clear code, and your light will disappear.

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Ran out of gas recently. when refueled and started again,check engine symbol stayed on? well mainted and has always ran great since new.


Sometimes the check engine light will come on if the fuel cap is not on tight enough. Check the fuel cap for an intact seal and install at correct tightness.

A major auto parts store will read out the stored trouble code in the car's computer for free. If the code pertains to the fuel EVAP system, the code probably set because you ran out of gas. Copy down the code and then have it erased. The check engine light should go out. If it comes on again, have the code read and the problem checked out.

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You gas cap is not on tight enough to seal causing the Check Engine Light to come on. When you tighten your gas cap you need to tighten it until it clicks at least 5 times, if it is tight than the seal on the gas cap may be bad. Replace with a OEM GM gas cap or a quality replacement that meets OEM specs.

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Check engine light came on Tuesday afternoon, after I filled the gas tank on Monday afternoon. If the check engine light came on because of the gas cap not being on tight enough, do I just tighten the gas...


Check engine light might have came on because of loose gas tank cap, but it's a good idea to read the code and check if it's not something else, you can take your car to an Auto Zone and they read the code for free and tell you the cause also. But if you want to reset the check engine light, only way is to disconnect the battery terminals and let it set overnight, check engine light will be reset. Hope it helps and let me know if you need more advice. Please don't forget to rate the answer it helps with my ratings, thanks!

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Check gas cap indicator light


Hi. this situation concerns a lose gas cap that you may have forgotten to tighten correctly during a recent fill up at your local gas station or, it could be that the original gas cap or replacement gas cap is not sealing the cap area correctly, preventing proper fuel pressure.

Check the gas cap to see if its tight and that it clicks when you turn it. make sure you turn until it clicks. this will ensure a secure fit.

Now, if you have just recently bought a new replacement cap, it may be the wrong fit and i would recommend purchasing the original replica form the dealership to ensure a tight fit.

Please rate and god bless:)

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Check engine light on at 90500 miles 2003 toyota camry is this just a reminder light for scheduled maint.?


Your check engine light usually means there is an issue with your emissions control system. The last time mine came on, I found that my gas cap wasn't on tight enough. I turned it on tightly and the light went off after 30 miles or so. Start there.
If you've tightened the cap and the light is still on after 30 miles, you may have a bad gas cap OR maybe you just got some bad gas at your last fill-up. Try a few gallons of high-test and drive it a while. If nothing changes, a new gas cap is probably the next cheapest option. Good luck.

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Check engine light.


I have had the same problem recently. I did some searching on the internet and came up with nothing. I went out to my car and decided to take a look at the gas cap. I noticed that after turning it and hearing the clicks that are supposed to tell you it is tight, the cap came off again with no effort at all. I brought the gas cap to Advance Auto Parts and I found out that the spring mechanism inside the top of the gas cap was worn from use. This was causing the vapors to leak out inturn causing the check engine light to come on. I bought a replacement STANT gas cap (specifically for the 2006 Suzuki Forenza) for $9 and the light has been off for the past two weeks. The dealer wanted $80 to diagnose the problem and then another $30 if they needed to order a gas cap. So, I decided $9 was better to waste then $110 trying to figure out the problem. I hope this helps.

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1 Answer

Recently i discover that my check engine light came on while driving ,so i check the gas cap and notice that the cap was not thightly close ,i closed the tighter but the light still stayed on,what could be...


If the problem was the gas cap It will take a while before the light goes out on it's own. The computer only runs it's test when conditions are right. And it has to pass at least twice before it request the light to turn off. If the light does not go out in a week or two you have another concern.

Jul 19, 2008 | Chevrolet Equinox Cars & Trucks

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