I bought a gas cap from checker auto parts because mine was broken the new one does not click....is it not fitting correctly?

No, you don't assume anything when the light comes on. You get the trouble codes read to find out which system caused it. If it was bad gas, you'd be noticing poor performance. When light comes on after fill, it's often an EVAP code.
Evaporative Emissions System Primer Ricks Free Auto Repair Advice Ricks...

Can't dismiss or second guess what you were told

Auto Parts Store counter people are not mechanics
or techs

Check for codes,then diagnose

Test,test,don't ask questions

try the evap solenoid in the back by the fuel tank

I learned the hard way that you cannot buy a replacement gas cap from Auto Zone and have it fit on a Chevy Equinox. I tried for over two months thinking there had to be some other issue (there was), but soon as I gave in and bought a cap from dealer, one of the codes cleared. Don't try to save money. For a few dollars more, it is worth it. I still have other code problems due to battery replacement, but learned my lesson on the gas cap.

Get the codes, you have OBDII, autozone, checkers, just about any auto parts that offer customer sevice offers this service, guessing cost money.

Go to a place that will read the code for free like checker auto parts story. Then you know if you can replace the parts.the engine light could be that the gas cap it not ***.

Yes, the wrong Gas Cap will cause your Engine Light to come-on and stay-on. The Gas Cap is connected with your emissions/EVAP system which is monitored by the computer. An incorrect Cap would cause incorrect cycling of fuel vapors, causing errors.
Only get your Gas Cap from the Desk at the Autoparts Store after they have looked it up on the computer. OR go to a Dealer to get the correct Cap, but this is usually more expensive. OR call a local Junk / Auto Salvage Yard and see if they have one for your specific/exact vehicle (this is the cheapest means). DO NOT by a generic Cap from the shelf, even if it says it fits all Ford's.
Let me know if this helped, or if you have additional information or questions. Feel free to contact me at FixYa.com!

Because this is a 1996, it's got a standard OBD-II computer. Take it to any auto parts store and ask them to read the trouble code for you -- every major parts store (Pep Boys/Autozone/Checker/etc) will do it for free.

Your OBD connector is behind the ashtray in the center console -- pull the ashtray out, then push down on the metal part at the top to release it and pull it the rest of the way out of the console.

If you generally do your own work, you might jump on eBay and look for an OBD-II code reader. I got mine for $25 including shipping. It's nothing fancy, but it's saved me a few trips to the parts store place.

Good chance they did something during oil change, inadvertently or on purpose. Check your oil level first, then look for broken wires. Check your gas cap too, a loos e gas cap is most frequent reason for the light to come on. Finally, take it to an auto parts store and see if they can hook up a diagnostic checker (for free, autozone does not charge for this service.) and tell you the problem.

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:)