Yes, I'm currently running a used single wire unit I saved a dozen
years ago from some former customer's car.  You probably lose a little
efficiency and mileage over time.

On 1/21/06, John Rodgers <inua@charter.net> wrote:
> Can the one wire version be used on a 2.1L engine?
> If not, why not??
> If so, what is lost without the other two wires.
>
> My newly installed  3-wire O2 sensor apparently has an internal fault.
>
> I have a brand-new-in-the-box 1-wire O2 sensor.

Casey
Olympia, WA
Biodiesel: "I drive in a persistent vegetative state"
'87 300TD intercooler (211k)
'84 300D (207k)
Gashuffer:
'89 Vanagon Wolfsburg Edition (186K)