2013 MaxxForce International engine code: spn 3251 fmi 2

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by eaglesweeper, May 14, 2019.

  1. ChuckMartel

    ChuckMartel Light Load Member

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    Jan 22, 2021
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    I would get the dpf pin tested and do a snap rest with the dpf off to make ensure the engine isn’t making too much soot. Also are the resets being done in Insite?
     
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  3. Prince bhangu

    Prince bhangu Bobtail Member

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    Mar 21, 2019
    Ontario
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    Thank you for your response.
    I had called to Machenic. He said he already checked & engine side is ok. Now he wants to replace differential pressure outlet tube. According to you is he going in right direction?
     
  4. Prince bhangu

    Prince bhangu Bobtail Member

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    Mar 21, 2019
    Ontario
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    Main issue i am seeing is truck is not doing regen while moving. When i do park regen, then it’s complete regen in 40 minutes.
     
  5. ChuckMartel

    ChuckMartel Light Load Member

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    Jan 22, 2021
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    Definitely had issues with those old dpf differential pressure sensors, as long as the tubes aren’t plugged, broken or kinked should be fine.

    Sensor should read 0psi with key on engine off.
     
  6. Prince bhangu

    Prince bhangu Bobtail Member

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    Mar 21, 2019
    Ontario
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    Ok
    Thanks a lot for suggestions. I would share here later
     
  7. ONEREALDOGG

    ONEREALDOGG Bobtail Member

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    Feb 21, 2022
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    Maxxforce won’t to a regen while driving got a code spn 3251 fmi 21 replace Aftertreatmen injector could he be the sensor that’s why it’s not doing a regen while driving
     
  8. ONEREALDOGG

    ONEREALDOGG Bobtail Member

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    Feb 21, 2022
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    Maxxforce won’t do a cycle regen replace aftertreatment injector getting a code 3251 fmi 21 could the sensor cause a no regen cycle while driving
     
  9. ChuckMartel

    ChuckMartel Light Load Member

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    Jan 22, 2021
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    Assuming it’s a 13L that code is for DPFDP excessively LOW. Could either be a leaking dpf, bad diff pressure sensor or damaged or kink pressure tube.
     
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