1994 Civic EX 5MT: DTC 41 (O2 sensor heater)

When I had to get the o2 sensor out of the '91 Nissan (about the same age as
your Honda), penetrating oils had no effect. With the 4 foot long piece of
gas pipe on the end of the breaker bar for leverage, it came right out. I
used a crow's foot socket & it was strong enough. Just make sure whatever
you use is a snug fitting 6 point & it shouldn't round off the nut.


On 12/3/06 10:26 PM, in article 3sNch.2402$sM2.407@trndny05, "Abeness"
> wrote:

> Abeness wrote:
>> I'll try running it with the sensor completely disconnected before I
>> replace it and report back if I have a minute.
>
> Car runs fine with the sensor completely disconnected. Now, I haven't
> yet reset the ECM, so will also try that and see if it's able to get
> past the lawnmower chug stage on default O2 sensor values before I pop
> in the new one.
>
> If only I could get the old sensor out... I've sprayed liberally with
> Liquid Wrench--will pick up some PB Blaster tomorrow--and tried running
> the engine for a couple of minutes to warm up the exhaust some. I have
> an O2 sensor socket, but am worried about rounding off the nut. I
> suppose I could snip the wires and use a closed sparkplug socket to get
> the old one out, but the O2 sensor socket seems pretty solid despite the
> slot for the wires.
>
> Since I haven't taken the heat shield off--those nuts are pretty well
> rusted to death--I have limited tapping abilities. Any other ideas?