O2 sensor damage?

["cruznmd" <racuti1@xxxx>]

Can you ruin an O2 sensor with a super-over rich condition or with 
excessive heat, say from a glowing cat?

The dwell meter on my car says the lambda computer and hence the freq 
valve are not operating properly.

Since I've been told by multiple sources that the ECU almost -never- 
dies, the O2 sensor is the most logical next item. The problem is, 
mine's nearly new. I did have it installed way back when my fuel 
system was totally hosed. I got the cat converter to glow cherry red 
a few times.

Thanks,

Rich