O2 sensor

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Jul 5, 2007 | 04:57 AM

n2000snake

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O2 sensor

theres 4 wires coming out of it 2 white i gray and i black.. black is ground I guess... which one is the signal wire?

Jul 5, 2007 | 05:46 AM

Gldnrkt(GT3076R)

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I would imagine it would be the grey wire....

the black is ground, one white is the sensor heater and the other white is the sensor power, grey SHOULD be the signal.

don't quote me as I don't have a bentley handy with me at the office. Hopefully other chime in.

Jul 5, 2007 | 06:44 AM

2.0GT35

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A quick search should show the correct answer

IIRC it is the black wire. Black does not always = ground.

Jul 5, 2007 | 07:13 AM

Gldnrkt(GT3076R)

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I feel so helpless without my all knowing Bentley (hides in the corner and weeps)

Jul 5, 2007 | 09:30 AM

n2000snake

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ahh thanks so its the black wire?

Jul 5, 2007 | 10:35 AM

2.0GT35

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Should be the black wire. But you can check this at the 02 sensor plug

right under the coolant tank.

BTW you do know the narrow band AFR gauges are useless other then acting like a disco ball? It will not get you a very correct reading even at WOT and it will just bounce around when not at WOT.