Gene S. Berkowitz > wrote in
.net:

> In article > ,
> lid says...
>> SoCalMike > wrote in
>> :
>>
>> > Dufus Systems wrote:
>> >> SoCalMike > wrote in
>> >> :
>> >>
>> >> Replacing the O2 sensors when you have an O2 sensor code is the
>> >> most commonly done waste of money there is. O2 code just means the
>> >> O2's out of range.
>> >
>> > mine said "heater circuit malfunction" or something like that. an
>> > ohmmeter verified it was open, reading 0 ohms.
>> >
>>
>
> Without the heater, the zirconia O2 sensor is useless at startup, and
> results in the engine running rich. That's bad for the catalytic
> converter, and the environment. The ULEVs have to perform well at all
> times, not just after they have "warmed up".
>
> --Gene
>

I was wondering if modern O2 sensor placement even lets them get hot
enough to light off. My O2 (like the integra and civic EX/SI) is placed
right in front of the cat below and behind the motor. That's pretty far
from the exhaust ports. Wonder if it ever gets to effective temperature?