Well i have had the Check Engine Light on since i bought the truck back in April..with System Lean Bank 1 and System Lean Bank 3 codes.....which i assume is becuase of my retapped O2 sensors and no cats.....but i am just wondering what would have caused it to go out?...

could it be the tempature change?...becuase it got ALOT hotter here than it used to be back when i got the truck.

THNX
Duggy

 

Most likely, you have a vacuum leak that has lessened with the hot weather. It is unlikely to be related to the O2 sensors and certainly is unrelated to the lack of cats (that causes different fault codes)

The light went out because the self-test didn't fail the last time it ran. It will be back. The computer has stored the fault code in memory (unless reset).

Steve

 

Does the check engine indicator light still light up when you switch the truck to "ON"? If not, maybe your bulb finally wore out .

 

no the bulb still works...i went and checked.

but i did forget to mention in this post that i cleaned my MAF in between that...

and after reading that large post before titled "Maf".....i am pretty sure that why it went out...

so my MAF must have been setting it off.

THNX
Duggy