4agze series 2 afm dli oxy sensor

[punkture]

okay, looking for a suitable oxy sensor: to my understanding it has to be a four wire one;
are these correct: +B,Earth,HT,Ox?? on my ecu i can only find an Ox no Ht pinout..?? 10 18 24 pin ecu... any help would be greatly appreciated

[thechuckster]

HT = is heater ... needs to be switched 12+

I's suggest you think of the O2 sensor wiring this way:
Heater+
Heater-
Ox
Earth (for Ox)

The pair of wires going to the heater are not polarised. As long as one gets ignition-switched 12+ and the other goes to earth, you're good.

The earth for the Ox should to go to the ECU earth - same earth as the other sensors (temp or AFM) would be best.

The only wire that needs to go to the ECU is the Ox.

[TERRA Operative]

If you're re wiring the Ox wire from the sensor to the ECU, make sure the Ox wire is shielded, and the shield is only grounded at the ECU end. If the O2 sensor is being connected to stock wiring, the stock setup is fine.