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Help - Cel Code 41 - Primary O2 Sensor - Heater Circuit Malfunc.

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Old Jan 30, 2002 | 10:51 AM
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Default Help - Cel Code 41 - Primary O2 Sensor - Heater Circuit Malfunc.

My buddies 97' Civic is throwing a CEL 41 code.. 41 says "Primary Oxygen Sensor - Heater Circuit Malfunction".

Does just mean that the O2 sensor needs to be replaced?
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Old Jan 30, 2002 | 10:57 AM
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Default Re: Help - Cel Code 41 - Primary O2 Sensor - Heater Circuit Malfunc. (mattlehrer)

I'd reset the ecu and see if it returns, it's quite possibly just a random error
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Old Jan 30, 2002 | 10:59 AM
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Default Re: Help - Cel Code 41 - Primary O2 Sensor - Heater Circuit Malfunc. (VaporTrail)

I have reset the ecu a few weeks ago and it returned..

His car is constantly stalling as well when he is at a stop..




[Modified by mattlehrer, 8:14 PM 1/30/2002]
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Old Jan 30, 2002 | 11:15 AM
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Default Re: Help - Cel Code 41 - Primary O2 Sensor - Heater Circuit Malfunc. (mattlehrer)

Not throwing any other codes? A PO2S shouldn't cause the stalling problem.. for the heater circuit especially.. at least I can't see why it would.
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Old Jan 30, 2002 | 11:15 AM
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Default Re: Help - Cel Code 41 - Primary O2 Sensor - Heater Circuit Malfunc. (mattlehrer)

Sounds like a bad O2. If the ECU can't get a reading it'll go full rich.
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Old Jan 30, 2002 | 11:16 AM
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Default Re: Help - Cel Code 41 - Primary O2 Sensor - Heater Circuit Malfunc. (Dave-ROR)

No other codes.. WTF is the heater circuit? Is that part of the 02 sensor??

Any ideas?!
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Old Jan 30, 2002 | 11:17 AM
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Default Re: Help - Cel Code 41 - Primary O2 Sensor - Heater Circuit Malfunc. (newt2)

Sounds like a bad O2. If the ECU can't get a reading it'll go full rich.
But then it would also through a PO2S signal code. Unless this is a skunk2 ecu.. then it'd be normal. lol
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Old Jan 30, 2002 | 11:18 AM
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Default Re: Help - Cel Code 41 - Primary O2 Sensor - Heater Circuit Malfunc. (Dave-ROR)

Do the codes come in a series or do you have to turn off the ignition and repeat to get all the codes?
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Old Jan 30, 2002 | 11:20 AM
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Default Re: Help - Cel Code 41 - Primary O2 Sensor - Heater Circuit Malfunc. (mattlehrer)

No other codes.. WTF is the heater circuit? Is that part of the 02 sensor??

Any ideas?!
Heated O2S. I think all (maybe not all though) hondas with heated o2s use 4 wire o2s. 2 grounds (one for heater and one for signal), 1 signal and one heater wire.
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Old Jan 30, 2002 | 11:22 AM
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Default Re: Help - Cel Code 41 - Primary O2 Sensor - Heater Circuit Malfunc. (mattlehrer)

Do the codes come in a series or do you have to turn off the ignition and repeat to get all the codes?
They'd come right after each other.. for example.. 22 and 41 would be.

LONG LONG SHORT SHORT PAUSE PAUSE PAUSE LONG LONG LONG LONG SHORT PAUSE PAUSE PAUSE LONG LONG SHORT SHORT PAUSE PAUSE PAUSE LONG LONG LONG LONG SHORT, etc.
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Old Jan 30, 2002 | 11:24 AM
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Default Re: Help - Cel Code 41 - Primary O2 Sensor - Heater Circuit Malfunc. (Dave-ROR)

They'd come right after each other..
That's what I thought.. It' was just a 41 then.

Anyone got a spare 02 sensor for me to try to see if thats the prob?
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Old Jan 30, 2002 | 11:51 AM
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Default Re: Help - Cel Code 41 - Primary O2 Sensor - Heater Circuit Malfunc. (mattlehrer)

They'd come right after each other..

That's what I thought.. It' was just a 41 then.

Anyone got a spare 02 sensor for me to try to see if thats the prob?
I sorta do. I have a working 4 wire PO2S with stripped threads... hehe
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Old Jan 30, 2002 | 11:56 AM
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Default Re: Help - Cel Code 41 - Primary O2 Sensor - Heater Circuit Malfunc. (Dave-ROR)

Way to help out dave
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Old Jan 30, 2002 | 12:07 PM
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Default Re: Help - Cel Code 41 - Primary O2 Sensor - Heater Circuit Malfunc. (Dave-ROR)

I sorta do. I have a working 4 wire PO2S with stripped threads... hehe
Fokker!
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Old Jan 30, 2002 | 01:23 PM
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Default Re: Help - Cel Code 41 - Primary O2 Sensor - Heater Circuit Malfunc. (mattlehrer)

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Old Jan 31, 2002 | 06:00 AM
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Default Re: Help - Cel Code 41 - Primary O2 Sensor - Heater Circuit Malfunc. (mattlehrer)

Anyone!?
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