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New to me ‘15 explorer sport/3.5 ecoboost recently had a check engine light come on. P0420 and P0430.
Not to familiar with turbo engines.
Erased the codes and noticed a “permanent” P0430 in the system and after around 20 miles or so the light came back on.
After viewing live data at idle, I noticed O2 sensor B2 S2 switched rapidly(bad cat) while other times it seems steady. The downstream sensors on bank 1 and 2 voltages are way off from each other,normal?
Also it seems another issue causes the cats to go bad so I included fuel trims as well.
Does this seem like a “lazy O2 sensor or another bad cat situation. Thanks a lot.
You won't know until you do a backpressure test....might be clogged. I'm not a fix it by the bottle type person but, down here in LA we get a lot of excess Sulphur in our fuel, I run acetone in every fill-up just to keep the sensors, injectors, cats clean but a few years ago on my wifes 1997 Cougar 4.6 V8 the cats were weak, I added a bottle of this two weeks before she is due for smog and it passes with no issues... and yes I can tell the difference.....
You won't know until you do a backpressure test....might be clogged. I'm not a fix it by the bottle type person but, down here in LA we get a lot of excess Sulphur in our fuel, I run acetone in every fill-up just to keep the sensors, injectors, cats clean but a few years ago on my wifes 1997 Cougar 4.6 V8 the cats were weak, I added a bottle of this two weeks before she is due for smog and it passes with no issues... and yes I can tell the difference.....
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