heated O2 sensor circuit question

[John Andrianakis]

Ed wrote:
> 
> I plan on relocating my O2 sensor further down into the header since the
> original spot reads off only 2 of the 4 cylinders. Thing is, the
> original sensor is a single wire, and I think I'd need a heated one for
> the new location.
> Any idea how to wire the heater circuit? Is it safe to wire the circuit
> to a switched (engine on) power source or was the heaer designed to shut
> off once it reaches operating temp?
> 
> -Ed
You can switch the heater on with the ignition switch.Its meant to be on
all the time.