I wasdoing my 1000 mile service on my 07 Road Kingand decided to check the diagnostic trouble codes.
Whendid thisI received a "P0152 Rear O2 sensor high (rich)". Is this anything
to worry about? I haven't inspected the plugs yet. I suppose I'd rather have it running a
little rich to keep things cooler. The bike has screaming eagle slip ons and no intake mods. I puchased
it like this new from the dealer. Any help would be appreciated. I thought I'd post this before I talk with
the dealer so I have something to say if I get the "don't worry about it" routine.

 

I have seen this very thing when I did a thousand mile service for a buddy, I cleared the code and it never came back, I have heard this is quite common, if it comes back after a few minutes riding then you possibly have a bad 02 sensor, things like anit sieze coumpound on the probe of an 02 sensor can kill it in a heart beat.

 

Yes, the sensors can be poisoned fairly easily by careless behavior, but when that happens I'd think the voltage output would tend toward nil and not the upper end of the spectrum, like "hey, I'm sensing a rich mixture" indicates.

 

Thanks guys. I'll clear it and ride a few miles and see if it the DTC Code comes back before I
let the dealer know.