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Re: 2001 Dodge Neon P0420
Posted to Emissions Forum on 10/4/2007 1 Reply

I have no problem throwing a cat at a 420 with mirroring O2 sensors and elevated readings.

HOWEVER, why is the car with the more active and more rangy O2 having STFT climb so high when we have always sorta been taught that it should be the OPPOSITE? As I hav... Login to read more.

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