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O2 sensor issue on Honda 420

Posted on 9/28/20 at 6:06 pm
Posted by Columbia
Land of the Yuppies
Member since Mar 2016
3132 posts
Posted on 9/28/20 at 6:06 pm
Anyone have experience with this? Bike is running fine but is showing a 23 code flashing. Has anyone replaced one or is it necessary to do? Anyone know how to clear the flashing light once replaced?
Posted by X123F45
Member since Apr 2015
27351 posts
Posted on 9/28/20 at 10:09 pm to
Most likely too late if already throwing a code, but dump a can of chemtool in it and run the hell out of it for a tank.

Pre 2015 model or newest emissions?

One will run for a LONG time eith the code. One eventually wont run at all.

If less than 30 months old, your dealer will replace it for free.

Happens on all the new 420s, 520s, and 1000s. Run them hard occasionally and it'll keep the gremlin at bay.
Posted by KillTheGophers
Member since Jan 2016
6211 posts
Posted on 9/28/20 at 10:58 pm to
Unplug the 02 sensor

And ride that bitch hard
Posted by Columbia
Land of the Yuppies
Member since Mar 2016
3132 posts
Posted on 9/29/20 at 4:54 am to
16 model. I rarely ride it except around the camp during deer season. Will doing the above clear the code or will I need to buy the tool to clear it?
Posted by X123F45
Member since Apr 2015
27351 posts
Posted on 9/29/20 at 11:11 am to
Run it like I said them disconnect battery for a while.

Might clear it.

Being a 16 eventually it will affect running.

Older models were different.
Posted by Simon Gruber
Member since Mar 2017
833 posts
Posted on 9/29/20 at 1:32 pm to
I’ve had mine changed 3 times under warranty on my 2014 rancher. It’s a known issue. Part is only like $30 I believe.
Posted by X123F45
Member since Apr 2015
27351 posts
Posted on 9/29/20 at 3:41 pm to
Old ones are. New ones I believe are a lot more.

Few guys in the club bought the deletes
Posted by Columbia
Land of the Yuppies
Member since Mar 2016
3132 posts
Posted on 9/29/20 at 3:54 pm to
So what’s with the deletes?
Posted by X123F45
Member since Apr 2015
27351 posts
Posted on 9/29/20 at 3:59 pm to
Bikes run. But smell rich all the time. And mpg is lower.

Fix it once. Occasionally run it really hard. It'll never go out again.
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