Snap-on Scanner live data

Print Thread

Re: Snap-on Scanner live data [Re: Dartslantsix] #3033834 04/15/22 01:58 PM 04/15/22 01:58 PM
Joined: Dec 2005 Posts: 11,655 Fulton County, PA C CMcAllister Mr. Helpful
CMcAllister Mr. Helpful C Joined: Dec 2005 Posts: 11,655 Fulton County, PA	Originally Posted by Dartslantsix I'm using a Snap-on scanner for the first time and I'm confused when looking at the live data. Most of the sensors make sense, but some don't. Is there a place that lists in plain English what the abbreviations for the sensors mean? For example the attached picture shows a graph for "1/1 O2S(V)". (car is 2004 PT Cruiser GT) My assumption is that this is the upstream oxygen sensor and the units are volts. However, from what I'm seeing online, the O2 sensor should oscillate between 0-1 volts. This graph shows 2.54v-3.39v. So, I'm wondering if I'm misunderstanding what the graph is telling me. There are a couple other lines of data that pertain to the O2 sensor, but none of them read between 0-1 volts. Edit: Just found this: https://www.snapon.com/Files/Diagno...municationSoftwareManual_EAZ0025B01H.pdf I'll have to start digging through it. O2 sensors range from 0-5 volts depending on the O2 in the exhaust. AF ratio sensors work differently. I doubt an 04 PT has an AF sensor. Spray a little carb cleaner in the intake. Then pull a vacuum hose to create an air leak and watch the results. Last edited by CMcAllister; 04/15/22 01:59 PM. If the results don't match the theory, change the theory.

Hop To