I've had my current setup of the PCIII with O2 eliminators and custom pipes on my 2006 Dyna Street Bob for about 2000 miles with no problems at all.
a couple weeks ago on a ride, I noticed that the engine light was coming back on after I started it for a few seconds and going off again.
so I cehcked the codes and I found P0154 - Rear O2 sensor open / not responding.
I thought the PCIII with O2 eliminators was supposed to take care of that?


any ideas what might be causing it?


Thanks

 

Maybe the o2 eliminator is bad

 

isnt it just a plastic plug?

 

same here and no its a resistor that fools the ecm by rerouting a perfect signal. if it gets moisture in it it will not do it right. It will rectify on it's own and try using dielectric grease with elect tape. It's a history code now as it comes on and goes off right after start. after 50 cycles of on off it'll clear. it's just telling you some **** went down....take it to the stealer if it bothers you.....they'll clear it for free.

 

You can clear it yourself

https://www.hdforums.com/m_327240/tm.htm

 

thanks guys!