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What causes the check gas cap light on dash to light. I have opened and closed cap and can't find anything wrong

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Check the seal on the gas cap for cracks and rust buildup around the filler neck.

Posted on Aug 31, 2010

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Posted on Jan 02, 2017

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How can I find out how to fix my check engine light, can it be related to the gas cap in any way?


It absolutely could be the gas cap. I would stop and get the code read for free at advance auto or autozone. If it is a newer 2003 -2006 Ram, they are known for popping engine light when the engine oil is getting old or if the wrong type of oil was put in.

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Gas door open warning light is on on 2013 jeep grand cheroke


Is the door switch damaged, or does it need adjusting? Is the connector plug to the switch properly connected?

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2004 Chevrolet Aveo check engine light came on 3 days ago & staying on- manual transmission- all fluids good - engine temp good - checked gas cap to make sure on tight - nothing seems wrong? is this a...


Get the code, any time you get a check light on the dash,that won't tell you what is wrong or what to replace,just what system has a possible issue

There is no common cause or problems on any vehicles, and all their hundred of parts and several systems.

The dash lights have been on vehicles for 30 years.

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My brake and gas cap lights come on when started and wont go off both checked ok not sure what next


THIS IS NOT A SOLUTION BUT I CAN SAY IT'S TYPICAL FOR TAURUS. I'VE BEEN DRIVING FOR THREE YRS WITH MY DASH LIT UP LIKE A CHRISTMAS TREE AND NOTHING GOES WRONG. I KNOW "MANY" OTHERS THAT HAVE THE SAME PROBLEM. GAS CAP CAN CAUSE CHECK ENGINE LIGHT TO COME ON IN OLDER MODELS. PROBABLY WHY THEY MADE A MORE SPECIFIC ONE.
GOOD LUCK...I COULD NEVER FIND A REASON.

Oct 21, 2010 | 2005 Ford Taurus

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Why check engine light come on mostly after refuiling after a long drive ?


Because your vehicle is a 2008 I feel it shouldn't be anything to pressing but still take some precautions.

What alot of people don't know is sometimes if the gas cap is not put on tight enough a little air might get in or your gas pump might have to work a little harder because it can't get full vacuum pressure with the cap slightly open. these are not major issues.

these are reasons why your check engine light comes on. It happened to my 2005 Buick Rendezvou We had the check engine light on for a week. The car never shuttered, stalled, delayed starts it ran perfectly fine. I took it in to check engine light their computer showed that it was the EVAP system which is the heating and cooling system I would have to get it checked for leaks or do a static check for leaks.

This didn't look good but then one day I had done some work for a friend told him of my problem he told me it could be my gas cap. The next day I asked my wife if the gas cap was working on vehicle it actually was broke I replaced gas cap and the check engine light came off.

Now with this story (which is true) don't assume every problem could be this. But if you are not noticing any stalls, delayed starts, shuttering anything out of the ordinary check the cap at times to make sure it is closed.

If you keep on having light on and replaced cap or made sure was securely on then take and get it checked out.

merry christmas

Dec 25, 2009 | 2008 Hyundai Accent

1 Answer

Light on my dashboard


ford taurus's are well known for this. the seal on the gas cap goes bad. before you replace the gas cap make sure when you close the gas cap you are turning it at least 5 clicks. if light stays on get a new gas cap. they are easy to install all you need to do is remove the gas cap.remove the gas cap strap. put ******** the new cap, close cap and turn 5 clicks. not clicking 5 time can set a p400 or p401 evap code causing the check enging /ses light to come on.

Apr 19, 2009 | Ford Taurus Cars & Trucks

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2002 kia rio rxv check engine light came on again..


the check engine light is not caused by any wrong fluid level or dirty air filter or anything else like that, it is caused by well over 100 faults that can occur in the computer controlled electronic engine and emission controls, u will need to go to a Kragen or Autozone parts store and get a free OBD 2 fault code test to get the code that set your light.

Feb 17, 2009 | 2002 Kia Rio

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