2007 PCM 5.7L with Check Engine Light On: Will only Idle

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  • sfreeman0410
    • Aug 2025
    • 2

    • Arlington, TX

    • 2007 Ski Nautique 206
    #1

    2007 PCM 5.7L with Check Engine Light On: Will only Idle

    I have a 2007 SN 206 with about 800 hours. It has been the perfect running boat, never an issue until yesterday. After running for a couple hours yesterday, the check engine light came on and it would only idle. I'm planning to get a TechMate Pro so I can read the DTC code and determine what the root cause is. Does anyone have input on a short list of likely culprits for an idle only condition? I'm a DIY sort of boat owner and just trying to get insights. I also already have the manuals downloaded and reviewed, including the Diagnostic Supplement. Any thoughts or wisdom to share? TIA.
    Tags: None
    • teffinger
      • Mar 2014
      • 1

      • Chapin, SC

      • 1982 2001 Ski Nautique 2007 SN 196
      #2
      Did you have any luck with this? I have a 2007 SN 196 which just started the same issue at start up. let me know what worked for you. Thanks,

        Comment

        • Spud
          • Jul 2006
          • 252

          • Echuca Australia

          • 2007 206 limited 2008 206 limited 2007 196 se 2010 200 team
          #3
          has the potentiometer on the engine ever been replaced? Sounds like its going bad!
            👍 1

            Comment

            • JayG80
              • Dec 2006
              • 241

              • Santa Fe, TX

              • 2007 Ski Nautique 2002 Ski Nautique 1999 Moomba Outback
              #4
              I agree with Spud, that is a good start as the same thing happened to me last month. My potentiometer cracked at the base and was just held in place by gravity. I spent $$ on a new one only to find out later a $16 replacement base is available, https://nautiqueparts.com/plate-potentiometer-dbw/

              Here is the PCM Manual with the diagnostic codes for the 2007, not sure why they are not listed in the PN Manuals section

              2007 Nautique ECMPINOUT-PCM.indd.pdf

              If it is potentiometer and you end up buying a new one, you send your ECM to PCM for reprogram. I was able to update the ECM at home using my Diacom with help from PCM.

              Also since you have a 2007, look on this site for PCM's SUP 2009-01 for 2007 and 2008 engines that need CAM retard changed.
              Attached Files
              Last edited by JayG80; 6 days ago.

                Comment

                • jpwhit
                  Senior Member of PLANETNAUTIQUE
                  • Aug 2016
                  • 656

                  • Cary, NC

                  • 1998 Ski Nautique 2012 Nautique 200 2014 MasterCraft X25 . 2019 MasterCraft ProStar
                  #5
                  The problem is almost certainly a bad TCP. But for a 2007 how you proceed depends on which ECM your boat has. 2007 was a transition year between the MEFI5 and eControls ECM. Step one is to look at the label on the ECM and see what that says.

                    Comment

                    • sfreeman0410
                      • Aug 2025
                      • 2

                      • Arlington, TX

                      • 2007 Ski Nautique 206
                      #6
                      I started this thread last August. I called my local Nautique dealer on Monday morning after my boat stopped working right. They promised to diagnose within a week if I brought the boat to them. I chose this path. They did have the boat in the shop and diagnosed by the end of the week and fixed a few days later. It was a cracked Throttle Position Sensor which they replaced and properly programed. I spent a few extra dollars compared to my normal DIY approach, but I was happy with the service and quick turn-around mid summer.

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