|View single post by Tsquare|
|Posted: Mon Sep 7th, 2020 12:19 pm||
Joined: Fri Nov 10th, 2017
Reputation Points: 2471
|That is supposed to be the upstream O2 sensor letting you know the air/fuel mix is off. My guess is ether MAF or injector.
'04 XLT regular cab 3.slo stepside
Came out of retirement to drive a school bus - I have lost my mind