po420 code (is it o2 sensor or catalytic ) | Page 2 | Honda Pilot - Honda Pilot Forums

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ImBroke

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Registered

2008 Pilot SE

Joined 7 mo ago

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203 Posts

#21 • 4 d ago

upstream is before the cat, downstream is after the cat.

Tequilero1998

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Registered

Joined 4 d ago

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4 Posts

#22 • 4 d ago

Thank you.

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