Dd15 codes P77, P78, P114, P373, P418

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by free2fly973, Jun 3, 2021.

  1. free2fly973

    free2fly973 Light Load Member

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    Mar 9, 2012
    Oklahoma
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    As title says I have these active codes on a 2014 western star 4900SF (FR8686 last 6 of VIN). All mode 5. These are ¾ of the codes that would suggest a bad RX Module.
    Replaced RX Module, which got rid of the P171 5 code. These codes are showing active. The module is an updated module, according to freightliner. Purchased from freightliner. Old module 06-71342-004. New module 06-94503-254.
    Pics show troubleshooting suggest: refer to OEM. I'm not understanding where to look in the dtnaconnect web site or manuals to find/figure out how to solve these codes, or explain these codes. I obviously have the dddl software and access to dtnaconnect website, but not getting any closer to resolving after weeks of searching.
    Any help will be appropriated. And thanks in advance.
     

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  3. free2fly973

    free2fly973 Light Load Member

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    Mar 9, 2012
    Oklahoma
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    No one has any clues to these codes?
     
  4. Trusty

    Trusty Bobtail Member

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    Oct 3, 2020
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  5. Trusty

    Trusty Bobtail Member

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    Oct 3, 2020
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    I have exactly the same codes and my check engine light switch on and of.
    Did you solve the problem?
    Thanks
     
  6. free2fly973

    free2fly973 Light Load Member

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    Mar 9, 2012
    Oklahoma
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    Not yet. Haven't found anyone that knows anything about it. I also haven't taken it to freightliner yet though. I try to steer clear of my closest dealer as much as possible because of past experiences.
     
  7. crusts

    crusts Bobtail Member

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    May 20, 2022
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    Have the same problem any luck finding out how to fix the problem? Thanks!
     
  8. free2fly973

    free2fly973 Light Load Member

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    Mar 9, 2012
    Oklahoma
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    Nope. I guess no one has any clue. Most of these are associated with rx module and last are axle temps. About as far as I've gotten.
    I need to chase wires for the axle temp codes and see what i find. May lead answer to others.
     
  9. Varga

    Varga Bobtail Member

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    Sep 20, 2018
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    What is your axle temperature readings on dddl. ?
     
  10. free2fly973

    free2fly973 Light Load Member

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    Mar 9, 2012
    Oklahoma
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    I don't have a gauge and my dddl expired. I do have sensors in the axles for temps though. Guessing for ECM. I'd like to install a gauge.
     
  11. Varga

    Varga Bobtail Member

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    Sep 20, 2018
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    Guessing is get expensive this days. You have to read what is the ecm read . Otherwise just pissing against the wind.
    Maybe you got lucky
     
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