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Is there any need to run a ground to the 3-wire O2 sensors ? 700 1985

posted by  ndesouza on  Sat Sep 4 21:44 CST 2004
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last visit: Sun Mar 18 15:14 CST 2012
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Hi,

I've been checking out the O2 sensor on my 85 740 GLE Non-Turbo. The 2 white-wires going to the 2-wire connector are the heater - right ? And the single green wire with the clip is the +ve connection of the generated voltage - correct ? Also - when testing the sensor by making the mixture lean/rich, I am measuring the voltage across body-ground and the green-terminal. Does the o2 sensor need to be unplugged to do this ?

Was somewhat surprised to note that the sensor dosn't have a separate -ve / grounding wire - considering that the voltage generated is so small.

Has anyone run a separate ground wire to the sensor and seen any benefit ?

Thanks !

Noel






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New Is there any need to run a ground to the 3-wire O2 sensors ? [700][1985]
posted by  ndesouza  on Sat Sep 4 21:44 CST 2004 >


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