So I got a CEL to change the cat and so I did. Then I got similar CELs for primary and secondary O2 sensors and I changed them too. I changed the secondary O2 sensor 500 miles ago and now I have a:

CEL #67, Catalyst low efficiency.

WHAT THE HECK DOES THAT MEAN!?!? And how can I fix it? This stupid cat stuff is annoying me now.

Thanks
-Moh

 

I'm having the same exact code on mine. I've reset the code in the past, and it didn't come on for about 2 months, but I'm going to try and replace it since I never have

 

brian you shoulda asked me, lol, it means your cat is not working properly, to remedy this problem, just get an o2 sim

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PrettyLude &raquo;</TD></TR><TR><TD CLASS="quote">brian you shoulda asked me, lol, it means your cat is not working properly, to remedy this problem, just get an o2 sim</TD></TR></TABLE>

yea, I was planning on getting a new one from http://www.sparkplugs.com

 

It means that your cat is clogged up, so really having excessive backpressure as a consequence as well. Find another cat, instead of axing the messenger.

 

Could this be caused b/c I have my silencer on and it is causing a disturbance in the 2.5" piping?