My check engine light came on after I failed to close gas cap tightly on my 2008 Acadia, how do I reset computer

I would stop using it & check for codes

A blinking dash light (MIL Lamp) could be a
converter ruining cylinder misfires

Not much gets reset,all your do is clear data & the
light comes back, until you find & resolve problems

check the water pump. it may be leaking out relief hole on bottom of water pump while running. it could have failed just before you stopped for lunch! good-day but if pump is ok while it runs. put a new thermostat in it.

the cap most likely set an evap code in the computer have it checked with a scan tool.if the cap is on tight then just clear the code and the light will go out.

Sometimes when you dont close your Gas cap tight, the light come on But could be something else detected by the computer. Take it to an auto part and they will scan it for you for free and they will tell you whats the code. Good luck

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!

If you are a DIY'er you can get a OBDII scan tool that connects to your laptop that can tell you the error code and allow you to reset your check engine light.

Check out http://www.fitityourself.netau.net/OBDII.html

Sometimes the check engine light comes on if you did not fit your gas cap tight enough. You need a code reader to find out the error code to help solve your problem.
If it is something simple (like a gas cap) and you do not want to get a code reader to find out what codes (problems) your vehicle computer is saying there is. You can try disconnecting the negative battery lead for 5 minutes. This should reset your check engine light. Drive and see how long it takes before it comes back on - this may help you pass the smog inspection...

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

The gas cap is most likely faulty. The gas cap is an integral part of the evaporative emission system. If it is not sealing or venting properly, it can affect the proper operation of this system. I would replace the gas cap and have the check engine light reset at an autoparts store. Most stores will scan/reset computer for free. Hope this helped and best wishes.

Check your gas cap and make certain it is tight. If the cap is loose, the EVAP system will fail and the service engine light will come on. After you tighten the cap, the light will clear after the next cold start up. If that does not work, you will have to have the codes pulled to determine the cause.
Take the vehicle to your local Auto Zone and ask them to scan your vehicle for trouble codes, they will do this for you at no charge, write the numbers down and reply back and we can go from there.
Good luck, let me know.
Regards,

If your gas cap is tight, it means you have an EVAP system leak somewhere. You would need to check all the EVAP hoses, or run a smoke test.