"START BLOCKED" LIGHT 2015 FREIGHTLINER CASCADIA

Discussion in 'Freightliner Forum' started by BigRigBillyTrucking, Oct 1, 2020.

  1. BigRigBillyTrucking

    BigRigBillyTrucking Bobtail Member

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    Hey guys and gals I just wanted to post a quick little update regarding a start blocked dash light.

    I was having issues with my def pump and it needed to be replaced I have the code SPN 4375 FMI 4.

    Coincidentally at the same time I started having START BLOCKED DASH WARNING POP UP & THE DPF REGEN LIGHT & HOT EXHAUST WARNING LITE turn on then off.

    Because I was having issues with my death pump and the above-mentioned code SPN 4375 FMI 4, I thought they were related.

    I just happened to be checking fuses & apparently my fuse box was cracked n only stays together once you put the cover back on.

    Well there was something loose in their &that is what kept causing it to intermittently cut out.

    So I just wanted to post this little quick update because when I exert for the problem that I was having I noticed not too many people had ever had that problem before and I hope that buy me documenting this it may help somebody in the future because Freightliner could not figure it out they tried to tell me my truck needed to be regen.

    I told him I'm no mechanic but I'm not a ####ing retard, clearly it has nothing to do with a regen.

    PS this post was written via text to speech.

    I ain't got time for grammatical errors in punctuation
     
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  3. BigRigBillyTrucking

    BigRigBillyTrucking Bobtail Member

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    If this post has helped you please leave a comment because I would love to know that 2 days of being down actually ended up helping somebody not waste time at Freightliner
     
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  4. Shaggy76

    Shaggy76 Heavy Load Member

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    Problems like yours are why dealer techs ask me how to fix things. They always follow their diagnostic trees without checking anything else. If you came to me and mentioned you had anything intermittent or a no start, I always check the fuse box. Those things are poorly designed and will end up with water, breaks at the mounting bolts, and melts from poor circulation to let the heat escape.

    I'm glad you found it and sorry it took 2 days of downtime to locate it.
     
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  5. RocketyMan

    RocketyMan Medium Load Member

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    What Freightliner dealer was this?
     
  6. BigRigBillyTrucking

    BigRigBillyTrucking Bobtail Member

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    Rymes with las schemgas....
     
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  7. RocketyMan

    RocketyMan Medium Load Member

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  8. BigRigBillyTrucking

    BigRigBillyTrucking Bobtail Member

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    No comment
     
    Last edited: Oct 5, 2020
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  9. Shaggy76

    Shaggy76 Heavy Load Member

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    They gave it a shot. They just don't see that issue all the time is all.

    When they are lazy is when they type up "Unable to replicate, performed regen, updated software." That's the tech being lazy.
     
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