CEL Question

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On my 91 DX Sedan, the CEL comes on occasionally when driving.  More so lately.  It always goes off after the car is turned off and sits for a minute or two, and doesn't come on again for days (at least).  It seems to be running fine.
I checked the indicator light, and it flashes once every 1-2 seconds.  Is this the quot;normal operationquot;, or is the O2 sensor going bad?
Thanks.
well, it could be a fault somehwere with your wiring, our cars dont have a progressive fault detector system like an OBD equppied vehicle does, but replace ur o2 anyway, its prolly like 10yrs old.
I've had that same problem since I got my h/b (almost 4 years ago). You're getting a code 1 (O2 sensor), like you mentioned. I replaced mine amp; still have the problem...
Though now that I have an a/f ratio gauge, as long as I keep the car from running rich (while I'm driving) I don't get the CEL.
another thing you may want to check out.
its been raining alot here the last 2 weeks. while i was on my delivery job, i ran through a deep puddle and about 10 mins later i got a o2 sensor cel.  
try removing the quot;ecuquot; fuse in your engine bay fusebox for 15 seconds. this will reset the ecu.  if you get the same cel again, i would replace the o2 sensor. make sure you get a honda o2, it DOES make a noticeable difference.
It's one fast flash, right?  Because that's a code 1.  One long flash is a code 10, which is the IAT sensor.  probably the O2 tho.   
Thanks.
It's the original o2 sensor for sure.  I've had the car since ~40k miles.  It's now at 180k     .  The car is w/ my stepson.  I'll replace it when I can.
One more questions.  I haven't replaced the spark plugs in about 100000000000000 miles.  Are they fused to the head by now?  I didn't use anti-seize and I don't want to break them off.