2000 civic ex and now i am getting code 41 witch is primary oxyger sensor heater. does it mean i have to change the O2 sensor????????????????

 

your running obd-1? if you ecu is chipped you can turned that off..

 

you could turn it off or just put a new o2 sensor in

 

Unplug it and measure between the two black leads: 15-40ohms is spec. If not, replace it. It's more than likely blown open. I've had two do it after 80k+ miles of use. They have a service life of 75-90k miles, so they're meant to be replaced anyway. Don't bother with Bosch though...

 

i am running obd-2

i installed used one and it's doing same thing.

when i check the code the cel flashes 4 times slow and 1 fast soo it's 41 right?

i wonder maybe it's not the o2 mabe cut wire or some thing like that?

 

Sounds like Code 41 to me. You're options, as I see them:

1. Keep wondering what it may or may not be.

2. Replace it again with another used one.

3. Troubleshoot it as outlined in the Helms manual.

I generally go with #3 because #1 wastes too much time and #2 wastes too much money. In going with #3, I've given you one of the first steps to troubleshooting this code. If it was good, then yeah, I'd get under the car and start checking the wiring rather than "wondering" if it could be the problem.