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Re: Lambda sensors - Where, Why and how Much ?



At 12:54 PM 6/8/00 -0400, you wrote:
The heater element of the O2 draws an ton of current and voltage compared to
the O2 sensor end of it.  You don't want the heater ever finding a ground
thur the sensor input
Grumpy


> > > > -- 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?
> Squash

Or to put this in a different perspective , the PCM isn't going to appreciate having a signal ground
shared with a high current draw heater circuit. All that noise ringing back into that discreet signal line. Ouch. Its a real plus to also have more than a surface ground on the sensor, which can become unreliable , even on OBD2 vehicles. Don't get the ground wires mixed up in position , hint,hint.

Len

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