So i was reading this DIY for how to install a Diode in the rear O2 sensor wiring so that the ECU sees the voltage it wants, assumes the cat is fine, and then stops giving "efficiency below threshold" codes:
and then stated reading this post about how to check the O2 sensor pins to see if your sensor is working, and what each pin does:
so what i am wondering is, does anyone know if it would be possible to simply clip the sensor harness leaving only a little bit of wire behind the connector, then connect those wires together in such a way that with the right diode/resistor combination inbetween them the ECU sees the voltages/current it wants, and assumes a correctly working, properly functioning o2 sensor is present and detects a working cat, when in fact it is not?
basically physically removing the whole rear o2 sensor completely? Plugging in a "fake" o2 sensor, and then just putting a plug in the 02 sensor exhaust bung?
anyone have any insight, ideas, or knowledge on the situation? if it would work, or why it would/does not work.
in theory it would be great, no fault codes, no codes caused by its absence, and one less wire bundle cluttering up the engine bay