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Typical bad cats? P0420 P0430 (data inc)
10 months 3 days ago #62322
by Jprix
Typical bad cats? P0420 P0430 (data inc) was created by Jprix
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.
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.
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- SimplyCircuits
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9 months 3 weeks ago #62383
by Tyler
Replied by Tyler on topic Typical bad cats? P0420 P0430 (data inc)
Seems fairly cut and dried. Check for exhaust leaks, TSB's and good fuel control. No problems found? Replace the cats. 
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