Help!
My car is now driving me mad..... I have a 2001 Vec B (z22se) thats burning oil, am getting a new bottom end soon...
It keeps putting on the EM light, and it reads cat efficiencey below threshold! turn it off it could be 2 or 3 weeks before it comes back on or 20 minutes.
It has a new cat on it (none approved) but it has only just started doing it.
does the ECU read the first sensor then the second one and know how much difference there should be? if so can i just swap the sensors over?
I have also read about a spacer? for the sensor, will this work?
Cheers