Quote:
Originally Posted by Lew
Have had only one P0139 on a quick scan with the Durametric and cleared it. It has not come back in a few weeks. I removed the MAF and cleaned it with the CRC cleaner a while back. New plugs at 30K and at present just 3k on them. I may have a vacuum leak somewhere. Going to look especially at the foam rubber around the Air Cleaner box. That's about it JFP.
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If the P0139 was real, you have an O2 sensor aging out on bank 1-3, which is one of the tools the MAF uses to try and control the mixture. If you also have a vacuum leak as well, that will also drive the MAF nuts.
I would use your Durametric to watch both O2 sensors on bank 1, to see if their voltages are inline. Could be the root of your issues.