SES again this time i think i got it

[hitbychance]

Hey guys, my HR is throwing P0420 again and from what i gathered is that its the cats,do you guys recommend replacing the O2 sensors or just springing for new HFC cats because stocks are roughly the same price.

[BusyBadger]

I forget (sorry...getting old! ), you don't live in the US do you? I try to make sure everyone knows about the 8yr/80K mile federally mandated emissions warranty.

If you're out of that range or don't live in the US I would personally just get a couple of HFCs. A workaround is just that, and the HFC will actually fix the problem. Besides, you can get it done when you get your new exhaust.

[hitbychance]

i live in canada, we have the emission warranty but the only nissan dealer in the city thinks it's a MAF sensor lol, bunch of retards trying to up sell a 500$ sensor.I might just get that godspeed and test pipes/hfc. problems would be solved at about 1000$ which is my budget

[BusyBadger]

f***!

Unless you've heard the exact setup before I'd steer clear of test pipes, I've yet to hear any in person that didn't sound raspy and annoy the crap out of me.