Kiamo

I have spacers on my secondary O2s, but I've recently started getting the CEL (Heated O2 Sensor 2 Bank 2; its always bank 2 by the way). It was fine for about 8000 miles, now I get these. Tried resetting fuel with Cipher and pedal ECU reset to no avail. Car has had a UTEC for a couple thousand miles, its running high 12s AFR under WOT.

Any ideas why this would start happening?

Wired 24/7

iTrader: (2)

What year is your Z?

It's no big surprise to get CEL with test pipes.

Check this thread for one way of helping get rid of the CEL https://my350z.com/forum/engine-drivetrain-and-forced-induction-diy/194001-test-pipe-ses-non-fouler-fix-pics.html

I'm not sure if by "spacers" you mean that you already did the non-fouler trick... if this is the case then I'm not sure how to help...

killerlexus

iTrader: (1)

the pedal trick worked for me. try the pedal trick a few more times. start the car up before you try the trick again if you mess up. timing is everyting, use your watch to time it.

Kiamo

I can clear the light with the pedal or Cipher, but its been coming back fairly quickly. Oh, and yes, by spacers I mean the non-foulers.
The car is a 2005 Enthusiast (non-revup).

Armitage

iTrader: (15)

I'll be getting TP's soon, but I'll probably won't get the non-foulers until after the install. Will I ruin my 02 sensors driving like that for a couple of days, or will I just throw the CEL until I get the non-foulers installed?