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  1. #1

    Intermittent P0544 error, where is the Exhaust Temp Sensor, and screens? (NOOB)

    New SeaDoo owner here,

    Just bought a 2005 RXT 215 with 260 hours for 4 grand with a trailer and new SS impeller and ring, plus some other misc goodies.

    Seems to be in very good condition, well cared for. Have receipt of SC rebuild with latest stock rebuild kit from the local SeaDoo dealership although I'll probably due a SC rebuild this off season.

    I gave it a test drive prior to purchase and had no error codes or issues at that time.

    Just took it out on my own yesterday and started seeing a P0544 code intermittently. So I brought it back in and put it on the trailer.

    I noticed the warning light cam on intermittently in that I did a run of about 5 min at medium speed before the light went on. I stopped and started the ski and no warning light for about a minute. Stopped and started and did a medium speed run for about 2 minutes and then the light went on. At that point I stopped and started again and took it in and trailered it.

    I have been reading the various posts on the P0544 and I think my issue may be one of two problems at this point although I am open to other suggestions.

    1) A partially plug water screen. I have seen this on several posts about P0544 issues. When I launched single handed, I did get near a shallow area and had some mud come up from impeller wash. Did not seem like any major mud or debris passed thru the impeller, as I was only idling out but I did notice a pretty good sized mud cloud in the water as I got out of the shallow section. (Yeah I know I should have walked it out further, noob mistake)

    2) An intermittent, loose or partially corroded electrical connector. Easy to fix with contact cleaner, etc.

    So thos are the 2 items I'd like to check, the problem is that I have no idea where either the screen or the exhaust temp sensor are located??????!

    I looked in a service manual I downloaded, and I am either missing that, or have passed over it, or whatever, but I cannot find out where these tow items actually are on the PWC.

    Can anyone give me a description of where to look for these? THANKS!!!

    Also, any other ideas on an intermittent P0544 code would be appreciated.


  2. #2
    Boost addict hotbird's Avatar
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    The mud might have partially blocked the intercooler.

    Run it on the hose for a few min tops to see if you can back flush it out.

    Also check to see if you have good water flow through the ski.


    Check that all the exhaust clamps are tight also.

  3. #3
    wotxxxsd's Avatar
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    Remember letting it run too long is going to cook your carbon seal.

    1-2 min max hose time.

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  5. #4
    wotxxxsd's Avatar
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    Welcome aboard the Hulk!!!

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  7. #5
    wotxxxsd's Avatar
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    Always good to be in deep water then got the start button..
    It's a noob mistake that we all have made before..

  8. #6
    Thanks ran on hose for about 2 min. today. Water flow looked good to my inexperienced eyes, I saw water mixed with exhaust around area of jet pump.

    Does that back wash the intercooler?

    Also, still do not know where screen or exhaust temp sensor is?

    Thanks for the help, really looking forward to enjoying this PWC.

  9. #7
    Boost addict hotbird's Avatar
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    The temp sensor is in the outlet of the water box.

    If you follow the j pipe (exhaust pipe off of the exhaust manifold) into the waterbox, the other pipe coming out of the water box should have a sensor on in. That's the temp sensor.

    What screen are you asking about??

    Was water flowing out of the pump/prop area as well? If water was coming out the pump prop area then yea that back flushed the intercooler.

  10. #8
    boost junkie skidoochris's Avatar
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    the sensor is in the outlet pipe of the waterbox/muffler
    IMO change the sensor
    the stock intercooler has large passages for waterflow and aftermarket ones have small
    that is why the screen is added
    if you had one it would be in a strainer

  11. #9
    I have been reading the forums and thought there was a water screen somewhere in the lake side coolant loop that needed to be looked after, is that correct or am I misunderstandding the system?

    I did have good water flow out the impeller area. I will probably flush it again tonight and try to be more observant of exactly where I am getting water return flow.

    Thanks for the info on the sensor location will look at that tonight as well.

    Thanks again

  12. #10
    Moderator beerdart's Avatar
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    Yes there is a screen in the pump its the plastic plug on top.

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