You can heat the sensor with a propane torch and put a voltmeter to the
wires. The correct output, seems like it is one volt, should be read. If
not, it's dead. The bentley can guide you to the correct output.

Jim

On Wed, Jun 29, 2011 at 1:04 PM, Michael R <michael@jamhome.us> wrote:

>
>
>
>
> Jim Felder wrote:
> > Maybe your O2 sensor has gone out, leaving you in "open loop"
> mode and its
> > notoriously bad gas mileage.
> How would one test
> for that before buying and installing an O2 sensor?
>
> --
>
> Michael Rasmussen
>   http://www.jamhome.us/
>  Be Appropriate
> && Follow Your Curiosity
>
>
>