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I have my CEL on and the code is 41 which is 'Primary Oxygen Sensor - Heater circuit malfunction' Now I've looked around here and some other places, but I haven't really gotten a clear answer. My Haynes manual doesn't herp much either Has anyone had this problem or know how to fix it?

 

change out your heater O2

 

If it's an electrical problem can't I just switch some wires, cause maybe they've become defective? Anyways, where and what is the heater O2?

 

Most likely your o2 sensor went bad.

If you're not comfortable replacing it, I have a friend in Fall River, MA that could hook you up.

-PHiZ

 

It's the heater inside the o2 sensor, you can't fix it you have to replace the o2 sensor.
Newer o2 sensor's have internal heaters that warm up the o2 sensor to like 400 f when you start the car to reduce cold start emissions and to get the o2 to start working faster.

 

Thanks for the offer :thumbup: But I think I'll be able to do it, I just need to get myself a flare wrench that'll fit the sensor, what is it, 19mm? Well I just hope it isn't rusted as hell.

 

21mm (or MAYBE 22, I'm going by memory).

I use a regular box wrench.... But that's because my O2 sensor tool crimps the cable on my wideband...

-PHiZ

 

Do yourself a favor and buy a cheapo o2 sensor socket from autozone.

 

Ok now expensive are these things? I really hope it aint over $100...

 

you can get the bosch, which worked fine for me, at autozone for $75