Originally Posted by
Accord1278
I had the same exact problem...here's my original post...
https://www.honda-acura.net/forums/a...ode-p0420.html
And here's my update:
Update:
The check engine light cleared itself!! Turned off yesterday as I was driving. I basically didn't do anything except that I put in a bottle of Lucas Fuel Injector Cleaner and let the gas tank run almost empty before filling up again. I didn't do any resets, didn't pull any breakers, didn't disconnect the battery, didn't replace the cat or the O2 sensors, etc. This time I made sure the cap was on there securely and heard a few clicks, because the person pumping the gas just threw it on without a single click. I drove it for about 50 miles before the CEL extinguished. I did step on the pedal like once or twice and had the throttle wide open for a few seconds while driving.
:bowrofl::bowrofl::bowrofl:
Just joined to see if I can find out why there is such a problem with all these Hondas reporting cats not working etc - I tried the injector cleaner trick and the warning light went out for a couple of weeks then came back on...
So I got the O2 sensor cleaned out (some gunk came out of the middle of it) and...the light went out again! Just driving it to see if this is a proper solution - I'll be back...