21 cascadia dd15 intermittent issue

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by lordnknn, Apr 6, 2025.

  1. lordnknn

    lordnknn Bobtail Member

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    Aug 23, 2018
    0
    Trying to arm myself with info before calling for service again. Any ideas what could be? What should I check and look for? Any help is appreciated!

    21 cascadia dd15.
    Codes are all mcm
    3509 4
    3563 4
    5444 1
    Power goes way down. Engine runs loud and whiney and shakey. Only up to 10 on the tach.

    First time it happened it stalled out. Limped to safety at 45 mph. Codes cleared while waiting for tow. Dealer couldn't see codes or recreate. Ran fine. Weeks later, today, enginge lunched went out of gear with same codes. Power cycle. Codes still there limp to truck stop wait and codes cleared. Ran fine. Ending day engine brake for exit check light lurch turned Jake's off and ran fine.
     
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  3. 062

    062 Road Train Member

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    The codes should have been stored. Do you have a ELD plugged into the 9 pin connector?
     
  4. lordnknn

    lordnknn Bobtail Member

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    Aug 23, 2018
    0
    No. Super connected mega eld.
     
  5. JB7

    JB7 Heavy Load Member

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    Dec 13, 2022
    Laurel, MD
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    A quick search and I found this.
    The fault code "dd15 code 3509 4" indicates a problem with the 5 V sensor supply bank 1 circuit12.
    DD15 Troubleshooting - Section 110.2 SPN 3509/FMI 4 - Detroit Diesel Engine Troubleshooting
    Q&A: Understanding SPN 3509 FMI 4 Engine Code for Detroit, Cummins, and DD15 Trucks

    3563-4
    The typical diagnosis for this fault is an Intake Manifold Pressure Sensor open circuit. 1. Disconnect the Intake Manifold Pressure Sensor (IMP Sensor). 2. Measure the resistance between pin 1 and 3 of the IMP Sensor. [a] If resistance is greater than 130 kΩ, replace the IMP Sensor. Refer to section

    5444 relates to the crankcase breather
    need help with dd15 code | TruckersReport.com Trucking Forum | #1 CDL Truck Driver Message Board
     
    lordnknn Thanks this.
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