So I have the p0141 code on my 02 D with the 4.7. My understanding is that it is the one after the cat, right? If so, I was under the impression that this sensor measures cat efficience and does not control air/fuel ratio. Is that correct? Even at NAPA it is a $92 part. Yikes!

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02 Durango SLT 4x4
Fastman TB
Cherry Bomb Pro
Flowmaster polished SS turndown
True Flow drop in
Power Wire
TMR Mod
Superchips 3715