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air fuel ratio signal wire on 1996 legacy


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You really need a wide band o2 sensor for an a/f gauge, the stock one won't give a very useful reading. Regardless, it should be pretty easy to figure out which wire is which. One will be +12v, one will be ground, the third is the signal wire you want.

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I don't know if the ECU will like the signal out of a wideband, it's tuned to work with the sensor it was designed for...

I guess the best way would be to add a bung for the wideband sensor, or maybe there's one that will work with the ECU.

 

What are you trying to accomplish here? I don't really see the reason in installing a a/f on a stock 2.2.

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You'll have to install a standalone wideband sensor for the gage. The ECU will not work with that type of sensor in place of the standard oxygen sensor.

 

The ECU also may not like it if you split the signal wire to the OE sensor. I think either way you'll be better off with a standalone sensor for the AFR gage.

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