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2nd TPS Failure in 6 Months

Discussion in '3rd Gen - 2007 - 2017' started by RedTail07, Sep 21, 2020.

  1. RedTail07

    RedTail07 Member

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    Hey ya'll,

    6 months ago our 5.4L 2014 XLT Expy EL starting lighting up in wrench mode. It was throwing off the code P0123. I replaced the TPS with an authentic motorcraft replacement (Part #DY1164).

    This week, the car started going in to limp mode again. Sure enough, it's throwing off P0123 again.

    Do you think I have a bad replacement TPS? Or is there something else that could be wrong?

    We've probably put 5000 miles on it since I replaced the first TPS. The vehicle has about 120,000 miles on it.

    Thanks in advance.
     
  2. 07navi

    07navi Full Access Members

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    Just put another one in there.
     
  3. Trainmaster

    Trainmaster Old School Member

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    Could be the throttle body is worn and letting the throttle move to far open or closed. Or there's wear in the throttle shaft. Check it out.

    Probably just a bad part though, as there's not much mileage on the thing and wear on the throttle body is not common.
     
  4. MrSticker

    MrSticker Full Access Members

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    Common mistakes when diagnosing the P0123 code
    • Not visually inspecting connections and wiring first

    • Not scanning, documenting and clearing codes, then retesting for them to verify failures

    • Not verifying and repairing wiring or connector problems after sensor is replaced

    • Replacing the TPS sensor without making sure it is the problem

    • Not verifying whether the TPS sensor A and B circuit voltages are within specification before and after repair or replacements.
     
  5. RedTail07

    RedTail07 Member

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    Thanks for submitting this. Do you (or anyone) have part numbers for the wiring connector? Also, what should the A and B circuit voltages be? All things I can check on. Is there a TSB or repair procedure out there for this?
     
  6. Utah Driver

    Utah Driver New Member

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    I would start with terminal tension.
     
  7. RedTail07

    RedTail07 Member

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    Quick update: I disconnected the battery and the TPS, looked over the sensor, wiring, connections, etc, and then reconnected. That seems to have satisfied the wrench light for now, but I've gone ahead and ordered another TPS since they aren't expensive if you get them online...you just have to wait.
     
  8. 07navi

    07navi Full Access Members

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    Sounds like the best plan...........:)
     
  9. RedTail07

    RedTail07 Member

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    I had this, the AC Blower Moto Control Module, and the wiper motor linkage all break down in the last two weeks. Pretty much right at ~110,000 miles. Fortunately those are all easy repairs.
     

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