So I am now part of the PPE Headers awesomeness group, and like many others I am getting P0159 and P0139. I've got the o2 simulator installed, and PPE verified the install was correct via pictures, and I'm still getting the code. Tried a few things like replacing the o2 sensors checking for exhaust leaks and checking all of the wiring and it all seems to be ok. So i'm stumped.

Did some googling and reading and I came upon this Mini Catalytic Converter that goes in between the midpipe and the sensor itself.

http://bigdaddiesgarage.com/mini-cat-cel-fix.html

Will this fit on a 350? Has anyone tried one of these before? Any thoughts or comments over it would be greatly appreciated.

Thanks a ton guys!!

 

Looks like the o2 weld on extension that PPE already includes in there header kit.

 

The exhaust gases Flowing to the sensor will be very low. Might throw a DTC P2A00/P2A03 A/F Sensor Circuit Slow Response