LAD572001 Posted July 28, 2004 Share Posted July 28, 2004 Help, I need to replace the oxygen sensor in my 01 Pathfinder and anyone tell me where is located. This is an $80 part online but the dealer wants to charge me $300 for parts and labor. I understand that it can be located in two different places. Link to comment Share on other sites More sharing options...
statikuz Posted July 28, 2004 Share Posted July 28, 2004 Incidentally, this question can also be located in two different places. Link to comment Share on other sites More sharing options...
Trialsin26 Posted July 29, 2004 Share Posted July 29, 2004 Actually you have four different locations. Bank 1 Sensor 1 and 2, Bank 2 Sensor 1 and 2. How do you know the sensor is bad? The reason I ask is because on my 2001 Pathfinder the check engine light came on and it said it was the o2 sensor. My friend and I cleared the code and it has not come back. We figured it had something to do with low fuel and a different grade of gas because everything else looked good on his computer and everything is back to normal. My 01 only has 38,ooo mile. Just wondering. :confused: Link to comment Share on other sites More sharing options...
LAD572001 Posted July 29, 2004 Author Share Posted July 29, 2004 The diagnostic test returned the following codes: P0420 - CAT EFFICIENCY LOW BANK 1 P0430 - CAT EFFICIENCY LOW BANK 2 P1110 - MFR CTRLLED FUEL AND AIR METERING I was told that these codes indicate that the O2 sensor maybe bad. Link to comment Share on other sites More sharing options...
lewisnc100 Posted July 29, 2004 Share Posted July 29, 2004 P1110 is Intake Valve Timing Control (Left Bank), very common. I'd start there before touching the O2 sensors. Link to comment Share on other sites More sharing options...
LAD572001 Posted July 29, 2004 Author Share Posted July 29, 2004 Ok, is this something I can check or replace myself? Remember I am a newbe and I am not firmialer with the term left bank or right bank. But I trying to save some money here so I am willing to learn. Any help would be great. :help: Link to comment Share on other sites More sharing options...
lewisnc100 Posted July 29, 2004 Share Posted July 29, 2004 You might consider a subscription to www.alldata.com, it will give you the diagnostic charts for each trouble code, access to all TSBs, all Nissan service steps etc. Well worth the $24.95 ($14.95 after first year). This was a new part as of 2001 so you might have trouble finding anyone with experience fixing this. Link to comment Share on other sites More sharing options...
Trialsin26 Posted August 2, 2004 Share Posted August 2, 2004 Lad5, did your Service Engine Soon light come back on, or have you checked the codes again? Just wondering what happened? I noticed you had something about the P1110 MFR CRRLLED FUEL AND AIR METERING, and I was just wondering if that could have had anything to do we a vacuum leak in your fuel system or maybe your fuel cap wasn't on tight. Because that might have effected the O2 sensors as well. :allclean: Link to comment Share on other sites More sharing options...
Dreadeyed Posted August 6, 2004 Share Posted August 6, 2004 I replaced my fuel filter over the weekend, since then the " check engine light" disappeared. The fuel filter works for me. After I 've checked all the EVAP line, my instinct told me to change the filter and I did. Link to comment Share on other sites More sharing options...
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