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What can cause the check engin light to come on?
my truck doesn't even have 10k on it..and the engin seems to run fine..
can the light come on if the gas cap can't close all the way?
After the BL my gas cap don't "click" when it is turns all the way...

thanks
 

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04RedLobster said:
What can cause the check engin light to come on?
my truck doesn't even have 10k on it..and the engin seems to run fine..
can the light come on if the gas cap can't close all the way?
After the BL my gas cap don't "click" when it is turns all the way...

thanks
There are dozens of things that can make the CE light come on. Yes, the gas cap is one of them.

Later,
....Mike
 

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IF the gas cap does not click when you tighten it then it is is not sealed.This will cause a check engine light to come on and give either a gas cap loose or an evaporative gas tank leak code to be stored in your ECM.Wherever you get the diagnosis done make sure you get the exact OBDII code and then see if it related to the gas cap situation.If it is then you will have to get the filler neck problem solved so that it can seal properly.By the way the check engine light is actually for emissions controls only,if theree was an engine problem then you would hear a noise or feel it running rough.Good Luck and sorry for the long reply
 
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