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  1. #1

    Unhappy 2012 fx sho code 65 on startup

    Got a 2012 fix sho showing code 65 on startup. Cleaned all connections and pulled sensors they both look good what should they ohm out at so I can check and make sure they are good also anonither ideas? Exhaust thermo sensor is what it said it is and what I cleaned. Thanks in advance. Appreciate y’all.

  2. #2

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    Google the service manual its out there for a 2008 sho same motor...my advice change the sensor.....
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    Last edited by HDAV; 09-24-2019 at 05:24 PM.


  3. #3
    TimeBandit's Avatar
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    Yup, faulty/flaky sensors are not uncommon. . .yet be sure to fully investigate the coolant system for blocked flow kinked hoses etc....

    If memory serves me. . . that sensor monitors exhaust quenching spray temps, so the coolant supply is mainly coming from the upper exhaust manifold, to the reg/rec, to the top/aft exhaust hose bib, which you could remove for a sec to confirm flow in the driveway.

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  5. #4
    You guys are the best! Thanks I’ll check those in the morning.

  6. #5
    I had a sensor go bad like that on a SHO motor. It told me it was overheating but it was just simply a bad sensor. I purchased one on ebay (new).

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