I replaced my sparkplugs with .044 gap, and roughly a week later my "check engine" light came on. I'm not sure if there's any correlation between what I did, or possibly I've got a bad O2 sensor...I've only got 2,700 miles on my 2006 xa, and I plan on taking it to the dealer on monday---just thought maybe someone else might have had a similar experience...
thanks

 

Why did you replace your spark plugs with only 2700 miles on them?

 

^^^ because he probably read this:
https://www.scionlife.com/forums/viewtopic.php?t=113980

 

I was hoping that wasn't it actually... b/c I think that whole thread is garbage. A Honda technician telling Scion owners what is wrong... ya.

 

what was the result of the cel scan from the dealer?

 

recomended spark plg change is every 30K

these are efficent running motors. super duper spark plugs arent gonna do much. especially if you only start with 108HP

i hope you didnt throw away the "old" ones.

check your vaccum lines and see if you got a pinched wire somewhere

 

Toyota has replaced an "o2" sensor and the light came back on, then the same dealership replaced the "mass air flow sensor," the light still came back on...I took the car to a different toyota dealership and they concluded that it is indeed the brake booster that has essentially a leak "vacuum." The part is on order--but, I really hope that's been the problem