Lambda sensors - Where, Why and how Much ?

[Len Sabatine]

At 01:16 PM 6/8/00 -0400, you wrote:
> > From: Squash [mailto:realsquash at yahoo.com]
> > Subject: Re: Lambda sensors - Where, Why and how Much ?
> >
> > --- Len Sabatine <sabatine at epix.net> wrote:
> > > > > -- One of those wires goes to the Ho2s [ Heater ] One
> > of the ground
> > > > wires is redundent.
> > >
> > >          Len
> >
> > Then why did they put 2 ground wires in?
>
>I'm not positive on this, but I believe that the heater ground is intended
>to be connected to any ground on the car, such as the exhaust or body, and
>that ground may not be at the same potential as the ground used by the PCM.
>That's where the second ground wire for the signal comes in.
>
>Eric Bryant
>The "Heater Ground to "Chassis Ground", Engine Block. Exhaust System is 
>not a great ground
  for this application FYI.

   Len
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