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Multiple codes on DDEC IV

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by henboy1, Aug 25, 2017.

Page 1 of 2
  1. Aug 25, 2017 #1
    henboy1

    henboy1 Medium Load Member

    332
    139
    Mar 26, 2011
    stockbridge
    0
    I have a 2000 century thats been sitting for about 3 yrs.I did a PM right before I parked it.2 weeks ago, the ECM had to be changed.The Check engine light wasnt on after the chnage.A week later , I am getting these codes when I hit the button
    22, 16, 31, 31, 34 and 36. in this order
    The first flash was a 62 from the PID/amber light.
    I am not sure which code is active.I have ordered a scanner and I am waiting to see what it says.The truck is not shutting down when I unplug the coolant level sensor .I I also unplugged the TPS sensor right under the accelerator pedal and it was in limp mode , so I know that sensor is fine.I also changed the coolant sensor and rewired it's wire leading into the sensor.(it had been rigged).I am still getting a check engine light thats constantly on.Truck drives normal.I am not sure whether it's the reason for the old oil for the code 36.
     
    henboy1, Aug 25, 2017
    henboy1, Aug 25, 2017
    #1
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  3. Aug 25, 2017 #2
    jamespmack

    jamespmack Road Train Member

    20,042
    216,406
    Mar 25, 2014
    OH
    0
    Disconnect batteries for 10min. Reconnect and start over. Probaly will have less codes
     
    jamespmack, Aug 25, 2017
    jamespmack, Aug 25, 2017
    #2
  4. Aug 25, 2017 #3
    GrapeApe

    GrapeApe Road Train Member

    2,215
    2,212
    Jan 7, 2013
    0
    On your engine, amber light is inactive faults, red light is active faults. Most of those are sensor faults, so I'd be looking for a problem with the 5v sensor supply.
     
    GrapeApe, Aug 25, 2017
    GrapeApe, Aug 25, 2017
    #3
  5. Aug 25, 2017 #4
    henboy1

    henboy1 Medium Load Member

    332
    139
    Mar 26, 2011
    stockbridge
    0
    The Nesxiq scanner came in the mail . I will try this method before I put the scanner on
     
    henboy1, Aug 25, 2017
    henboy1, Aug 25, 2017
    #4
  7. Aug 25, 2017 #5
    jamespmack

    jamespmack Road Train Member

    20,042
    216,406
    Mar 25, 2014
    OH
    0
    You should be able to clear with scanner.
     
    jamespmack, Aug 25, 2017
    jamespmack, Aug 25, 2017
    #5
  8. Aug 25, 2017 #6
    henboy1

    henboy1 Medium Load Member

    332
    139
    Mar 26, 2011
    stockbridge
    0
    Sorry ,I meant Nexas . Definitely not a pro link . I hope it works with it
     
    henboy1, Aug 25, 2017
    henboy1, Aug 25, 2017
    #6
  9. Aug 29, 2017 #7
    jamespmack

    jamespmack Road Train Member

    20,042
    216,406
    Mar 25, 2014
    OH
    0
    What did you find?
     
    jamespmack, Aug 29, 2017
    jamespmack, Aug 29, 2017
    #7
  10. Aug 29, 2017 #8
    henboy1

    henboy1 Medium Load Member

    332
    139
    Mar 26, 2011
    stockbridge
    0
    Sorry for the late response . I received the Nexas code scanner . That small screw on the tps sensor was loose , plugged it in, and later, the light was gone . I doubt the screw was the issue , because I unplugged the tps plug and the truck was undriveable . No check engine yet , and the truck is parked until I take it on the road next month . No check engine light so far
     
    henboy1, Aug 29, 2017
    henboy1, Aug 29, 2017
    #8
  11. Sep 2, 2017 #9
    Junkyard Johnney

    Junkyard Johnney Light Load Member

    209
    190
    May 27, 2012
    Plains,Mt
    0
    Those TPS sensors can be touchy, I put on a brand new one several years ago and had to loosen the screws and move it all the way one way to get it to work, new wiring harness also at the same time. Strange deal. My code list shows your codes as follows
    22=TPS input voltage low
    16=coolant level sensor input voltage high
    31=Aux. High Side Output Open Circuit or
    Short to Ground
    34=turbo boost sensor input voltage high
    36=oil pressure sensor input voltage low
    obviously all of this cannot be happening at once, one sensor is messing with the readings on the others, I had a fuel temp circuit high code that would jack with other stuff like that. For awhile I could clean the connection on the fuel temp sensor and make it all stop, eventually though I had to replace the short harness from the sensor plug to the main harness. Lucky for me on this T800 it was all plug and play. I run a Prolink Plus what a life saver, what did the Nexas come up with? It should have a code clear mode also.
    J-J
     
    Junkyard Johnney, Sep 2, 2017
    Junkyard Johnney, Sep 2, 2017
    #9
  12. Sep 3, 2017 #10
    Hulld

    Hulld Road Train Member

    2,884
    6,568
    Oct 19, 2015
    Upstate NY
    0
    With that many codes I am wondering if its corroded wires in one of the engine computer to cab harnesses.
    They are definitely know for this problem.....
     
    Hulld, Sep 3, 2017
    Hulld, Sep 3, 2017
    #10
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