I have a 2006 ford explorer. the check engine light is on. I went to auto zone for the free diagnostic test and and the code shows an emssion leak (large). Before this started, I had a gas cap light that came on and I replaced it. reset the computer and then the check engine came on. how would I go about finding the leak?
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erase code again , then disconnect battery for a few minutes, reconnect, see if code comes back. hopefully this resets computer. you don\'t have a reset button on steering wheel do you ? replace your fuel filter, if you haven\'t lately. maybe that will help.
HI. This will require you to have the engine CPU scanned for trouble code's. This can only be administered with the assistance of a diagnostic computer scan tool. You can purchase this tool at your local auto parts store, or you can just have the scan ran at your local auto zone parts store, free of charge. Once the diagnostic scan is administered, you will be able to isolate the issues that have caused the check engine light to illuminate.
This scan tool will display a print out code and the location of the issue, on the engine, as well. There are Many issues that will cause the engine light to illuminate, but the most common cause will be a failed monitoring sensor, or sensor harness failure(separated power wire, or ground).
Once you have the codes, kindly return to the site, and post them here. We will be able to assist with more accuracy, once the codes are posted.
you need to get the computer scanned and see what codes are present auto zone does it for free you cant pass an emission test with a check engine light on or right after you clear the codes it has to be driven and be in a ready status to pass hope this helps
Did you replace the gas cap? Also check the filler tube that's where the gas cap snaps on where you put gas in. The filler tube or neck has a thin lining of plastic at the top look for small cracks in it where the gas cap goes on. It there's cracks in it, it will cause an emission leak and sometimes a dealer won't find it until you spent a lot of money on diagnostics. And it depends if there best mechanic was working on it.
The check engine light is part of the vehicles emission system.This normally won't effect the running of the automobile , but it will fail emission inspection( if required in your state). It could be anything from faulty gas cap to bad spark plugs causing it to come on. Most auto parts chain ( i.e. Advance or Auto Zone) offer free diagnostics for the light , to find out why it is coming on.
The 1st thing you do is have the system tested for the trouble codes that are turning the lights on, I doubt the 2 are related from past experience. Kragen auto and others do this test for free, post the codes back here and I will help you get this fixed