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The "tighten fuel cap" message comes on the dash. Followed shortly by the check engine light coming on. Used and engine analyzer to clear the check engine light. Put light coating of petroleum jelly on the gas cap gasket and tightened. Cleared check engine light after a few days it returns???
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The "gas cap light" actually does not mean the gas cap is loose or defective.It is telling you there is a leak in the fuel system somewhere,usually a vapor line or stuck or defective valve.Not very often is it the gas cap that causes the light to come on.Time for a scan and a smoke test to fine the leak.
The ES330 has a notoriously bad fuel cap problem. Notice that if you tighten the cap two clicks it will come off with one finger. They apparently have a different cap not just a new cap. It will cause the Check Eng light to come on but apparently may also affect the VSC because it affects engine performance. When the VSC light comes on it will also shut down Trac Control and turn on the light. Replace the fuel cap! Cheap first fix. If you need to clear codes when you get the cap at Autozone they'll scan it and clear codes.
Go to the parts store where you bought the cap. Sometimes the code clears on it's own and sometimes you need to have it reset. If this is not an option disconnect the negative battery cable for a minute. Just as a warning, if you disconnect the battery you will have to reprogram most all of your electronics.
The fuel cap needs to be tight or it will set a code. It's a pressurized fuel system. Try to tighten snug the code should clear itself. If this does'nt work exchage the fuel cap, it may not be working properly.
Your vehicle does two types of evaporative leak detections by the on board diagnostics. Depending on the test your a getting a gross leak detection fault this is usually caused by a faulty fuel cap that is not holding the vapor in the tank. The tests have to be done under set conditions so the problem will only occur when the test is commanded and the test fails. You will get the fuel cap then the check engine light.
The most common cause of this is the gas cap not being tightened completely after re-fueling or a worn rubber gasket on the cap.Remove the gas cap and turn it over and check the gasket if it looks like it's not worn put the gas cap back on and then tighten it until it clicks several times, then it make take a little while before the check engine light goes off. If this still happens shortly after tightening the gas cap have the check engine code read at an Automotive Parts store. Some stores have the code readers and they'll get what the code means and advise you at that point.
have a local dealer clear the light(they will most likely charge u/ but they may not)), and make sure u tighten ur fuel cap at least 3 clicks after ur next fill up...
if I clear the code it goes back to normal
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