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Discussion Starter · #1 ·
The truck is a 2015 F150 3.5 ecoboost.

I was getting codes for the O2 sensors being out of range on both banks so I went in and just changed all 4 of them since theyve got 150k on them. I put Bosch O2's in. Its a couple weeks later now and im getting a P0430 that wont go away. I havent had a chance to check the connection, i guess i should start with that. With the milage im not sure on the cats. I dont really want to spend the money on new ones and i dont think I can gut them like we can on the cougars.

Thoughts?
 

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Premium Member
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4,448 Posts
430=low efficiency=running hotter than expected

Assuming the sensor is good:

Lower intake manifold air leak?

I would think a mil-eliminator or anti-fouler would clear it up if you wanted to mask the real problem for some reason.

Does it have a similar 3-cat system as ours?
 

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1999 3.0 SilFro
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Yeah I'd just slap an anti-fouler on that post-cat sensor and hope for the best.
 
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