The check engine light will not turn off. I had it checked and was informed it was the gas cap. The gas cap is tightened and the light still will not turn off.
How long did this happen? or make sure its on and give it a few days and it will reset. or take the red cable off the battery and hit the brake. or your just going to have to take it to a shop
SOURCE: Check engine light/ dash message "tighten gas cap"
I can't tell you where yours is but I can tell you how to find it. It's a plastic (sometimes metal) cylinder about the size of a normal coffee can. it has a flat vacuum fitting on the top with usually three or four hoses going to it. Normally it is located low against one of the fenders and can usually be seen easier than you can reach it with your hand. on the bottom you will see a cloth filter. If you can find something like that, you have found it.
I would also check the lines and hoses going to the fuel tank. Any leak in the vapor recovery system will show up as a cap leak which is only a part of the system. (just did one on a Pontiac GA with a similar problem)
SOURCE: The "tighten fuel cap" message
It's the gas cap sensor. Or you are getting a vaccuum leak somewhere.
SOURCE: My check engine light came on shortly after
Well in the newer cars you cant have the car running when filling the tank.
Take it to either advance auto or autozone and they will have a scanner. Tell them you dont know what the code is. Watch how they hook it up.
They will let you borrow it, but for what they say are "liability reasons" they wont clear your codes. Just hook it up and use the scanner. Really easy, menu driven device. And it will save you a bundle compared to what the dealer wants I'm sure.
SOURCE: 2005 Chevy Malibu gas cap tightened, chk eng still on.
It needs to be reset or cleared this can be done at your local AutoZone or local repair facility.
SOURCE: got numerous "tighten gas cap" messages. finally
computer is seeing a large evap leak. most common cause is gas cap left loose this is why it is throwing up that message. since you have already done that we know there is a leak somewhere else. look underr vehicle and should see a black rectangular box close to gas tank this is the evap canister check the lines hooked to this and just do a visual inspection of hoses see if one has come off. may need to have it checked out we have a machine that hooks into system and pressurizes with "smoke" the smoke leaks out of the problem area and helps diagnose .
The information below was complied by me, it explains what causes the check engine light to come on and the process of finding the cause.
When the Check Engine light (or Service Engine Soon) is turned on, the systems computer control unit (called the PCM) has sensed a fault in the electronic controls of the engine and/or the emission system. When this happens you will seldom feel the car engine run any different. There are about 200 possible system faults (the gas cap is just one of them) that turn the Check Engine light on, to know what has developed a problem you must have the system tested, this is called an OBD2 fault code test, Kragen/Oriley and Autozone parts stores (USA only) do this testing for free.
The information below was complied by me, it explains what causes the check engine light to come on and the process of finding the cause.
When the Check Engine light is turned on the computer control unit (called the PCM) has sensed a fault in the electronic controls of the engine and/or the emission system. When this happens you will seldom feel the car engine run any different. There are about 200 possible faults that can occur in the system that turn the Check Engine light on, a leaking gas cap is just one of them. To know what has developed a problem you must have the system tested, this is called an OBD2 fault code test, Kragen and Autozone parts stores do this testing for free.
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