cleaning sensors
 

anyone have any knowledge or links on how the clean out oxygen or exhaust sensors. I think this might be the reason for my poor FE these days.

I have no check engine light but a P0420 (I think) code has come up in the past and was cancelled again about a year ago. however recently car slightly jerks under acceleration and FE should be better than what it is. don't want to get a new sensor just yet for incise it might be something else.

I have an obd2 plug and torque app but im not sure what the graphs are telling me and what they should be telling me

A dirty post cat O2 sensor should be a very unlikely cause of a p0420, in fact it could even prevent that particular code from setting. A p0420 sets because the post cat O2 is seeing the simlar switching from lean to rich, that would be the normal signal from the pre cat O2. If the cat is working normally the post cat O2 produces a near flat signal, steady / steadier voltage