hi can any body help, i have just bought a universal 4 wire sensor but the wires are different colours? the wires on the car are red, red/white, yellow and brown but the wires on the sensor is black, grey and two white. does any body know what wires go where

 

Yes I can help. Place unit in trash can immediately. It will not help you do anything at all. Its a useless annoying light show.

 

Wow. Registered to make that one comment huh?
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I like this guy.

 

Is this for a replacement sensor..or for a guage ?

 

LOL. Thanks. I just bought my 05 RX8 last week. I have been snooping around for a while.

 

this is for a replacement sensor the one that goes in the cat

 

Without knowing at least what brand you bought, I don't think anyone can help.

What name brand and model is the sensor?

 

Exactly. Two wires are gonna be for the heater circuit and the other two are for the sensor. Which one is which i couldn't tell you. If you have a multi meter my guess would be that the pair of wire that has the least resistance should be the actual sensor. But that is an guess. Now that i think of it. Search o2 sensor eliminator and you may find some helpful info. Its been a while since i built one i don't think i still have the schematics. Im currently at my daughters dance class. When i get home i will look through my backups and see

 

Ok I found it. But it doesn't help much. Except I was incorrect. The sensor wires Ground and Signal form the sensor should read higher than the 2 heater wires. But still. you need to get the diagram for the sensor that you bought. After that it will be really easy to probe the sensor while its in the car to figure out which wire is which.