My check engine light comes on very often and everytime I've gotten it checked, they say it is the gas cap. I know I put the gas cap on right. Recently when I get gas, the pump clicks off like my tank is full after only a couple gallons. Then it will not stay on when trying to get gas. Could there be a problem with my fuel tank pressure or something?

Engine light on ,any DTC'S diagnostic trouble code's stored ? Have the EVAP system smoke tested .

You may have gotten air in the fuel tank when you filled it. Be sure when you tighten gas cap to hear at least 3-4 klicks.

No hose on the overflow hole.
The cap should click when it is tight.
You may be smelling the vapor canister which is doing its job.
The fuel tank system is sealed so the computer opens a valve from time to time to vent the tank thru the canister. It may be in the engine compartment or around the fuel tank.
If there is a problem with the fuel tank vent system the check engine light should come on.

If the gas cap is tight then rpelace it.

If you allready checked the gas cap and its on right.
Try replacing the gas cap with a new one.
You should here air wen you open the gas cap after driving
This is part of the emision controls and if it dosn't seal it will cause the check engine light to come on .

Tighten your fuel cap 3 times to make sure its tightned. don't push it in when you tighten it. Use Fuel injection cleaner like once a month... You may have gotten bad gas. Don't use 100 percet gas. Use gas with ethenol... you get better gas mileage. I go through 3-4 tanks a week. I use the 87 octane and I put Berrymans Fuel injection cleaner in once a week. I don't know about your hesitations though I drive a 5 speed

go to an auto parts store and have them test it.the check engine light could be a gas cap leaking. you could replace cap or o-ring,
could be a plug also.
how does the engine run. i cracked the porcelin on a plug once.
it ran terrible and the check engine light came on. i knew what it was because it didn't seem right when i put it in.
start out at the auto parts store first

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

By having it scanned and cleared with an OBD tool. This light comes on when it detects a problem. Could be a bad gas cap, or it could be a misfiring engine. The code you get from having it scanned will pinpoint the trouble area

The 1st thing to do is find out which one of over 100 codes is stored in the engine computers memory, whenever the check engine light comes on a code for that problem is stored in memory. You can go to any Auto-Zone parts store and they will run this code read test for free, then post them back here and I will help figure out what has gone wrong.