Hey all,

I have a new o2 sensor for my tracker but it only has one wire and the old one has 3 (2 red and one black one).
I heard the sensor only actually uses one wire, and one other one is ground. Anyone know which one of these wires I should use (I'm thinking of the black one) or should I just measure it with a volt meter?
Oh yea it's a 1992 1.6 8v injected.

Hey,

The two other wires should be for heating. there are 1,3,5 wire sensor that I am aware of...You could try "cleaning" the old one with a propane torch to blow off the carbon and see if it works b4 you hack your wires.

-Allen

Hey,

there are 1,3,5 wire sensor that I am aware of...

and 4 wires

One wire is O2, ground through exhaust
Two wire is O2, GND
Three wire is O2, Heater ground through exhaust
Four wire is O2, GND, Heater, GND
Five wire is Wide Band O2 sensor - very different (both sorts)

You need to have a 3 or 4 wire sensor. The ECU will probably detect the absense of the heater current and  flag an error code (41). If it does then it will also default to open loop running all the time so the O2 sensor won't have any effect at all. You should be able to measure the voltage from the O2 sensor with a digital voltmeter once the sensor is up to temperature - the problem being that that might not happen at idle without a heater. Let me know if you get the error code up I was going to check this on mine.

i just changed my o2 senosr last night (3 wire) the black wire is the signal to the ecm and the two red wires were for the heating circuit - would definatly use a 3 wire sensor - good luck