Universal Oxygen Sensor

[mhenry9885]

Hi guys,


I just bought a 4 wire universal lambda sensor, does anybody know if it matters which way the 2 white wires (heater) go and how will I know if i get it wrong?. Its a bit silly making 2 wires the same colour

Thanks in advance

[DSHornet]

I replaced the O2 sensor on a Suzuki Sidekick several years with a universal sensor that had two wires as you describe. The instruction sheet with the sensor said the polarity was unimportant since the same-color wires go to a heater in the sensor to bring its temperature up faster so it can start working sooner after starting the engine.

[mhenry9885]

Thanks For That,


Could anybody tell me which wires the black and grey wires connect to (ecu side)

To cut a long story short I no longer have the connector of the old oxygen sensor (it melted) and need to know which wires go to where

Its the O2 sensor in the manifold

Here's how I have currently wired it up:

Black (Signal) --> To wire going to ECU
Grey (Ground) --> Ground Wire
Both White --> To remaining 2 wires

It sounds right to me but could somebody confirm it

Thanks Guys

[DSHornet]

On the front sensor:
blk sensor to yel/wht (signal)
gry sensor to blu (signal gnd)
wht to lt grn/red (+12 V)
wht to red/grn (chassis gnd)

On the rear sensor:
blk sensor to blu (signal)
gry sensor to yel/wht (signal gnd)
wht to grn/blu (+12 V)
wht to blk/red (chassis gnd)

This info is from the wiring manual for my '96 Sportage. Sorry for the late reply, but I don't check the forum as often as I used to.