i pulled some code on my 98 civic and got 67 and 65. anyone know what code 67 is and how to fix it. also how do i go on about fixing secondary O2 sesor heat[code 65].

....should i just buy a new one and replace the old one.

 

replace downstream o2

 

thanks!!

 

code 67) Catalyst System Efficiency Below Threshold- Malfunctioning catalyst system