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Test o2 / lamda sensor. Which is the sensor wire?

1333 Views 1 Reply 2 Participants Last post by  DrFeelGood
So iv had some issues with the O2 sensor, and wanted to test. I know I can test the sensor wire to ground, but Im unsure which of these 4 cables are the correct one.
Anyone have an idfea, or a better way to test theO2 sensor.

Also, is there 1 or 2 on these car, I was a bit unsure if it had an upper aswel?
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