CEL Question

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 "normal operation", 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 & 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 "ecu" 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. :smokin:

Thanks.

It's the original o2 sensor for sure. I've had the car since ~40k miles. It's now at 180k :ylsuper: :ylsuper: . 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.