There are codes for o2 sensors and primary o2 sensors. So what is a primary o2 sensor heater?


Modified by allmotorEG-SI at 10:22 PM 7/22/2004

 

the first sensor before the cat. need more info on the car.

 

Code 41-Primary oxygen sensor heater is the rear o2 sensor(after the cat). I just threw the same code yesterday morn.


Honda wants like $230 for it...Im gettin one for $50 from my buddy. Good luck man

..adam..

 

its a wire on the o2 that gets its power from a 12v source. did u wire your o2 sensor when u did a swap or did you change something recently

 

no, stock 94 civic si. light just came on one day

 

Have you just reset it to see if it was a fluke? Maybe the O2 sensor is just starting to go bad.

I see them in the classifieds all the time for about $30. I sold mine for $30. Bought a brand new OEM one for $50. Just look around.

 

ya, tried dissconnecting the ecu fuse, that didn't work. So then I just dissconnected the whole battery. Light still came on.

 

Pull the O2 sensor out and inspect all the wires. Make sure none of them have been worn through or anything. If they are all ok you may just have to replace it.

 

from what i have found on other websites is it is possibly a circuit malfunction. What is an oxygen sensor heater anyhow?

 

There are 4 wires to the O2 sensor.

2 are the signal and its ground.

The other 2 are for the heater element inside the O2 - think whats inside a light bulb for lack of a better description.

One wire is fed +12 while the ECU uses a PWM gnd signal on the other wire.

To properly troubleshoot, simply unplug the O2 sensor and using a multi-meter measure the heater resistance: should be 15-40ohms (Helms spec).

I once had a code 65, which is just the heater code for the 2nd O2 sensor - ended up having to replace it - it can't be fixed.

Don't go to the dealer either - OEM O2's can be had for around $150 from places like hondaautomotiveparts.com.

 

i got the same code 41...on my 98 civic hatch....62K miles....think that's covered under warranty? anyrate, but did the exact routine - cleared the codes...checked the wires..unplugged battery...but my car still idles low and still dies each time i come to a stop...kinda hard to the revs high hhehehe

sounds pretty early to have o2 sensor (heater) problems..


hondaautomotiveparts.com huh?? i'll definitely hit that up. glad i did a search.

thanks!!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Slow98sedan &raquo;</TD></TR><TR><TD CLASS="quote">Code 41-Primary oxygen sensor heater is the rear o2 sensor(after the cat). I just threw the same code yesterday morn.


Honda wants like $230 for it...Im gettin one for $50 from my buddy. Good luck man

..adam..</TD></TR></TABLE>

The primary o2 is the first O2 *BEFORE* the cat. Costs $160 for the oem part if you buy it online from http://www.hondaautomotiveparts.com or http://www.slhondaparts.com . I believe that http://www.prostreetonline.com is selling a replacement for a reasonable price.

http://www.hondaautomotivepart...82%29

 

The 02 sensor your talking about is the one in my header right? I never really had to deal with these things befor. So i'm not really to sure as to the whereabouts of it.