Re: OBDII PO420 CEL Code Help
As suggested, could be the second O2 sensor after the cat.
A cheap fix, at least for older Honda's, 95 to 2005? - buy a couple spark plug anti-foulers - remember those?
Drill out the hole of the first one to clear the O2 sensor bulb, stack on the second one, then reinstall sensor with foulers and plug-in, clear code and drive away.
At least it worked on my '98 Civic DL w'1.6L.
Give a man a rescued dog for the health of both their souls. May 2017 ROTM Winner - Thank you!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
CUBS - 2016 World Series Champions - maybe this year, 2019 ...