A/F Meter readings

[John O Hornfeck]

John O Hornfeck wrote:
> 
> Ok, all you O2 experts:
> I installed my K&N A/F meter today on my MR2T and all seemed fine.
> The little lights: up&down,up&down, then I go out on the highway and
> after 15 min of 70mph NO lights. "Oh damn, junk meter." BUT it starts
> working during the cool down (~4min). So I drive it some more in town
> and everythings fine. BUT when I take it out on the thru-way again the
> read out is gone, returning only after during prolonged idle.
> 
> What the heck????
> 
> John O
Continue:

Drove the car again today. The A/F meter stopped functioning after
15 min of 70mph. Used my multi meter at the Ox port and there was 0
volts. Drove the car another 10 min and the gauge began functioning and
the Ox port was reading normally 0-.5 volts. 

Is it possible/likely that an open circuit can occur and be affected by
the heat?

Should I be ordering a new O2 sensor?

John o