My shop installed GTM RTP's on my 2007 g35s and unfortunately even with the extended o2 J-Bung my car is throwing CEL P0420.

I wonder why it's throwing only P0420, which is the passengers side and not P0430 which is the drivers side?

Berk and GTM were kind enough to explain that both these codes do not affect performance.

Berk has recommended to use stainless steel wool and maybe purchase non-foulers. Where is everyone buying these parts from? Links are appreciated.

Anyone else running this code with their RTP/HFC? What was your solution/experience?

I was also worried that maybe my o2 sensors were bad so I pulled some live data from my OBII scanner:

O2S B1 S1 (V) 0.445
O2S B1 S2 (V) 0.280

O2S B2 S1 (V) 0.900
O2S B2 S2 (V) 0.290

Does this look right?

Thanks!

 

Wait so this happened even with the new sensor installed? Just read your post on nyc.

 

There you go my friend follow this link.

https://g35driver.com/forums/v36-diy...t-hfc-fix.html

 

Btw i also have the same problem, i had crawfordz hfc on my 2005 g35 for almost three years didn't had no SEL light, However after installing the same Crawfordz hfc on my 2007 G35 & 300 miles later sel shows up. I spoke to the guys over at crawfordz & according to them the 2007 coupe have different ecu then 05 coupe. Anyways make the long story short i am installing my 02 fouler this weekend.

 

That was for the front o2 sensor and now I'm showing a CEL for the rears. This code is common with TPs and HFCs... It doesn't affect performance but I still want it cleared...

 

Thanks, I had this in mind. I think I'm going to add some stainless steel wool in there as well.

Let's keep each other updated on this thread.

Thanks!

 

Ah I see hope you find a solution.