Originally Posted by JRZEE2000TR4LTD

I wouldn't trust an app on my phone compared to a readout on my Fluke. Furthermore, I have a Scanguage 2 and the the values you put in to get the correct output and addresses from the ECU can be changed thus changing the readout. I did this to acquire a proper AFR reading from the front sensor of my Cali emissions 4Runner. Some have said that the OBD2 reading is a direct voltage reading somehow from the charging system but I don't buy that.

On a side note, I did @mtbtim brush replacement using his video and I caught mine JUST in time. 182,000 miles. They were completely worn down to where they were just barely riding on the shaft. One of the easier repairs I've done on my Runner. Thank's Tim.
I don't think this is your problem though.