My SES light came on today while driving down the road. Everything is normal. Anybody have a gues what i could check or does that light come on sometimes for no reason. The only thing i could think was the other day i put 5$ of texaxco premium in but the station had the three in one pump. where it all comes out the samwe handle. I probly got some 87 then untill 93 got in the line

 

One morning driving to work my SES light came on. Truck was driving fine and I wasn't beating on it. When I got to work I put it on the snap on scanner and it had a code for one of the banks getting a reading that she was running to lean. This is b/c I had my chip out with my breather still in. I cleared the code and it never came back. Have you done anything to the truck recently>??? -Mat-

 

i put ngk TR5 spark plugs in i.But they hade been in aout two weeks.