I was trying to think of something more secure - there isn't anything to stop the surfaces of the housing and the wire / connector from rusting, and not being electrically connected any more. That would work for a test, a temporary set-up, but I mean for a permanent connection.

Mike Collum <collum@VERIZON.NET> wrote:  I haven't done this but ... how about attaching a ground with a hose
clamp? Just a thought.

Mike

Evan Mac Donald wrote:
> Any body got any other ideas for attaching a seperate ground to a 1-wire O2 sensor? I don't want to trust the rusting exhaust system and its connections. The only permanent connection I can think of is to solder a lead to the outer housing, but I am afraid that even the upper edges get too hot, and will remelt the solder. Can a lead be welded on? How much heat is too much? I can braze a connection in place, if that won't destroy my shiny new sensor.
>
> And that raises another question. On a newer-style, self-heated O2 sensor, is the ground only for the heating element, or does the sensor also use that same ground?
> In other words, does the sensor ground through the housing and then the exhaust system, or does it also use the ground for the heater?
>