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Topic: oxygen sensor test

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onematd
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Posted: May 31 2010 at 12:30pm \| IP Logged

Hello,

I have a 99 Frontier 4x4 3.3l. I got an SES light and the codes were P0302 and P0325. I backprobed the pre-cat oxygen sensor signal wires and got: Passenger side: fluctuates from .08 to .7 volts. Driver's side reads almost steady .32 volts regardless of throttle position. Are both correct. If not, which one should I change? Also, does anyone have a coolant system diagram?

frontierguy
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Posted: May 31 2010 at 8:49pm \| IP Logged

The P0302 is cyl 2 misfire and P0325 is for the knock sensor. I would say the pass O2 is OK and the driver side is not. You are looking for 0 to 1V fluctuations at 2,000 rpm.

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'10 Altima SL
Traded 08 Frontier for 16 Frontier SV CC Long box, quite an upgrade. I do miss the 6 speed and Dynomax ex.

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2011 John Deere X720SE

onematd
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Posted: May 31 2010 at 9:19pm \| IP Logged

Thank you for the input. I will re-test @ 2000 RPM. Could this discrepancy cause these particular codes?

ronierogers
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Posted: Oct 15 2011 at 12:20am \| IP Logged

frontierguy wrote:

The P0302 is cyl 2 misfire and P0325 is for the knock sensor. I would say the pass O2 is OK and the driver side is not. You are looking for 0 to 1V fluctuations at 2,000 rpm.

so P0325 is for the sensor! good thing you mentioned that one in here so i dont have to do a new thread and ask again the same question. thanks for the nice input frontier guy. you just save my time and preventing me to have a headache knowing about that code. cheers! by the way is this oxygen sensor good? anybody tried buying to this site?

frontierguy
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Posted: Oct 19 2011 at 8:46pm \| IP Logged

ronierogers, P0325 is for a KNOCK SENSOR not O2 sensor.
Most O2 sensors are made by Bosch that I have seen.

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'10 Altima SL
Traded 08 Frontier for 16 Frontier SV CC Long box, quite an upgrade. I do miss the 6 speed and Dynomax ex.

Nissan Technician 25 + years
2011 John Deere X720SE

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