GM Guru's

This truck fails the O2 sensor switch test. Looking at the O2 sensor on a Labscope the voltage readings go below .1v and above .9v and has a switch ratio of 3Hz at 2000 RPM's. During the testing of this truck the switch counter never came off of 1. ...

FIX posted 11/14/2006

iATN Members:
Login to view full TechHelp request
Auto Repair Pros:
Join iATN to read this TechHelp request
Vehicle Owners:
Find a nearby iATN member to repair your vehicle