did the gotts 02 mod cel still on

i have the P0432 code -Main catalyst efficiency below threshold (bank 2 i did the gotts o2 mod and the light came back on after i reset it. Do you have to do the mod to both sides or just the one bank causing the code. i have a 2003 f150 172,000 miles 4.6 and im running gutted front cats and magnaflow highflow cats. any thoughts?

 

I would do both and if that doesnt work i would do a mil elimantor thats what i did when i cut my rear cats at

 

thanks but im thinking its the 02 as well since they are the oem ones

 

well if you did the mil elimantor you dont need to replace o2 sensor

 

where d you get yours

 

You cant get them any more. They illegal now. You can use a spark plug non fouler and it will keep the light off.

 

I did this $4.50 DIY O2 Sensor MIL Eliminators

 

I have basically the same thing. Mine is actually a seperate harness.

 

the non fouler s are what i did but the light still on haven't had a chance to fool with it