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1996 Nissan Pathfinder Question: 1996 nissan P1401 EGR Temperature Sensor

 

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shannonconnolly, 3.3L V6, Walnut Creek, CA, February 09, 2011, 19:18
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I have a 1996 nissan pathfinder and failed smog due to check engine light. code P1401 EGR Temperature sensor, Bought one... don't know if I need to clean the valve and how to get a diagram or some info on what to do...

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  • Answer #1

    Hal... (see my shops), February 09, 2011, 19:24
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     Master

    It's the temp sensor in the EGR passage. Need to check it first.

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  • Answer #2

    patrick mannion from Greg Solow's Engine Room, February 09, 2011, 19:36
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     Master

    Test the old sensor see if it has 8 to 10 mega Ohms resistance at 32 degrees, .6 to .7 mega Ohms at about 122 degrees , if it "open/no continuity the sensor is definitely bad. The sensor may be OK just not seeing exhaust flow across it due to a bad EGR valve or vacuum modulator. Alldata has easy to follow tests.
    Autozone have some popular workshop manuals for free on line once you register (for free) on their website http://bit.ly/autozone_repair_info.
    and get an online repair manual subscription.
    There are two companies that independent auto repair shops "buy" their information from that offer a very reasonable service to do it yourselvers. You can get a one week subscription or year subscription very cheap. The information is year make and model specific repair procedures, service bulletins, component locations, wiring diagrams ect.... great quality information same as the professionals have,much better than generic workshop manuals from parts stores and much cheaper than the factory manual try Alldata which is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online or Mitchell on line http://bit.ly/Mitchell1_Online_Repair_Manuals and get an online repair manual subscription.

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    shannonconnolly, February 10, 2011, 18:43
     Rookie

    Thank you very much! I am on it! and will let you know how it turns out!

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  • Answer #3

    Visitor, February 09, 2011, 19:44

    First test the EGR system for malfunction. At 2500 rpm the valve should open, if not check for vacuum, if you have vacuum and the EGR opens, next check to see if the vehicle will stall when manually lifting the valve. if you stall, the system is good and poceed to testing the sensor. First check for an open circuit, then measure the resistance.

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