Output shaft speed sensor

skatchkins Oct 18, 2018

  1. skatchkins

    skatchkins Test Drive

    Messages:
    7
    Location:
    Arizona
    Xterra sat for a while at the mechanic's for AC work. As I drove away, the Service Engine Soon light came on throwing code P0720 - Output Shaft Speed Sensor fail. There doesn't seem to be a lot of info on the net about this sensor. I replaced what I believe to be the sensor. It's the last sensor on the transfer case (because 4wd).
    Advanced Auto Parts had the correct match with part sn7152.

    [​IMG]

    After replacing the sensor and clearing the code, the light and code came back on after a short drive.
    Any guesses? I'm trying to track down a connector to replace that now.

    *Neither the tranny nor spedo is having any issues, but the code needs to go away for emissions testing.
     
  2. Muadeeb

    Muadeeb Bastard Admin from Hell Admin

    Messages:
    15,916
    Location:
    Dallas
    Check your grounds on top of the intake. They _shouldn't_ have messed with the rest of the circuit, but I can see them working with the intake for some reason, and that sensor grounds to the top of the intake.
     
  3. skatchkins

    skatchkins Test Drive

    Messages:
    7
    Location:
    Arizona
    Thanks for the quick response. I traced it back to the intake ground. It's secure.

    I did just notice that this lower pigtail on the passenger wheel well seemed to be less than plugged in...

    [​IMG]
    *photo shows it plugged back in
     
    Last edited: Oct 18, 2018
  4. Muadeeb

    Muadeeb Bastard Admin from Hell Admin

    Messages:
    15,916
    Location:
    Dallas
    That would do it too. Those run to the transmission. Figured they _shouldn't_ be in that area, so they wouldn't have been messed with.
     
  5. skatchkins

    skatchkins Test Drive

    Messages:
    7
    Location:
    Arizona
    Cleared the codes. No light so far but I need to put a few more miles on it to be sure.
    Thanks muchly for starting me on my hunt. Really appreciate it, Muadeeb.
     

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