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Codes keep showing up

Discussion in 'Western Star Forum' started by RandyLAROSE, May 10, 2018.

  1. May 10, 2018 #1
    RandyLAROSE

    RandyLAROSE Bobtail Member

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    May 15, 2015
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    Good morning I have a 09 Western Star series 60 Detroit I've replaced the engine wiring harness and all sensors I keep getting code's 15 and 21 code 15 is oil or coolant temp sensor voltage High code 21 is TPS sensor I have also cleaned up the grounds on the firewall I have also cleaned all the connections on the engine in the MCM and the engine also check for corrosion on the plugs on the firewall not sure what else to do any suggestions from anyone thank you
     
    RandyLAROSE, May 10, 2018
    RandyLAROSE, May 10, 2018
    #1
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  3. May 10, 2018 #2
    nasriza

    nasriza Road Train Member

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    Feb 1, 2013
    Chicago, IL
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    well from my knowledge the harness that the tps goes on is between the cab and the engine, which is quite a pain to replace and also very expensive so you need the harness on the truck side now the strange thing is that coolant goes on the engine harness unless there is something that is broken as far as a connection to the dash, my next step would be to check the truck to engine harness that's where your problem is. but when it comes to electrical only god knows where that wire is,
     
    nasriza, May 10, 2018
    nasriza, May 10, 2018
    #2
    RandyLAROSE Thanks this.
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