Dilberto

I'm getting sick and tired of the warm-up catalyst efficiency codes P0421/P0431. Who has done the 02 bung mod?

Rossi

Did you ever address the P0421 & P0431?

J'sWorld

Mirza should have coded those out for you. Maybe he didn't because you are in Cali. I could be wrong but I think it is possible to show the those monitors as ready even though they aren't.

You can use spark plug anti fouler's which is all o2 extenders are or you could check out these offerings from Fabspeed. https://www.fabspeed.com/universal-o...verter-single/
The anti foulers just move the sensor out of the exhaust stream and they may or may not work for you.
BTW, with all my mods and emissions deletes I am 100% code and CE light free.

Rossi

Who is Mirza? Please elaborate.

What are your mods and how did you go about emission setup?

v10rick

I have used O2 simulators on other makes with success.

This site lists them for the Cayenne GTS.

https://www.fvd.net/us-en/FVD111LAMS...ividually.html

Rossi

Thank you Rick, I ordered these ..... they seem to be generic version of Fabspeed units.

https://www.ebay.com/itm/90-Universa...12d7%7Ciid%3A1

J'sWorld

He's a tuner. All my mods are in my build thread. Emissions?? (Insert evil laugh here)

Libast

We have no need for emissions here in the State of Oklahoma.