What are different ways to test out this code? Code 41 = (Primary Oxygen Sensor) - Heater circuit malfunction.

I've looked at the wires and the o2 sensor but they seem to test out ok. What eles could this be? I've had this CEL for a while and just want all the codes to go away before I dyno tune this thing

 

ttt

 

anyone?

 

send it to a mechanic

 

Clear codes ans start the car. If the check engine comes on immediatly then you need a new primary o2 sensor. You can't be wrong with that.

 

make sure the 2 black wires at the o2 sensor are still in the plug and making a
good connection. too many times those wires just fall out for some reason.

 

I tried it with 2 different 02 sensors and the light comes on right away after I cleared it.

 

I looked at all the wires and the connections are all good, nothing loose.

 

Is there a way I can test the 02 sensor with a multimeter? If so what readings should I get...

 

perhaps check and make sure you are getting power from the O2 wire on the wiring harness.

 

How do I check that on the multimeter?

 

What car?? I'm guessing that you didn't have to convert from a 1 pin to a 4 pin oxygen sensor... Atleast if you don't have an EG with one or something.. If you have an OBD2 forget that i ever said anything about it... I was just wondering because you'll get a heater code if you have the polarity mixed up on the heater wires, but if you didn't have to mess with the wiring then that is not the problem... This is what I would do, continuity test the wires from the oxygen sensor plug back to the ECU pigtails just as shown below... Sorry about the shitty quality but i Just drew up the diagram really quick... Good Luck and lemme know if you need anything else..

 

Damn, hahahha I took a long time to write that post^^^^ I started after sgT posted
EDIT: Sorry, I also forgot to mention that you use the DMM to test for continuity in case you didn't know that... hehehehe Also make sure the car is ignition is off when testing... Latez


[Modified by Kataku2K3, 11:36 AM 2/19/2003]

 

How do a continuity test? What setting should I have my multimeter on?

I'm new to the multimeter so sorry about the questions.

 

Don't worry about it.... it's all good... The continuity setting is just a setting when there is a closed circuit, mine and most DMM's will beep when you have continuity... Touch the two probing leads together and go through the settings if you are unsure.... Here's a pic of my cheap one.... I'm just showing you this one because it has a lot less settings than my other one... It works just the same tho... As you can see it's the top setting and it says "CONT"....

 

Thanks your the man! I will go to the garage and check it out

 

jdm_***, what in the **** are you doin???

 

If you replace the o2 sensor, your problems will dissappear

 

He already tried different oxygens sensors...

 

OK I just tested the wires and they all tested out ok (they all beeped). So whats the next step?

BTW I have a JDM B16 (obd1) in my 92 Si hatch.


[Modified by futuresi, 8:26 PM 2/19/2003]

 

See I dont know if the other 02 sensor I bought is good (used), is there a way to make sure the o2 is bad?


[Modified by futuresi, 8:26 PM 2/19/2003]

 

Okay, well that's good... That means all your interior wiring is good... My guess is the oxygen sensor then... I guess you'll just need to try another one... I don't really know how you could test the O2 itself, but atleast everything else is straight.... Good Luck

 

http://www.lakeeffectperformance.com...ns&product=428

Would the o2 sim work my problems?

 

The resistance of the O2 heater should be 10-40 ohms. Measure between the black wires on the sensor.

 

take a multimeter and measure the resistance of the heater circuit. It should be 14 Ohms, any thing other then that will cause the engine light to go on.