Derate to 5mph crisis - regen not clearing codes for some reason

Discussion in 'Freightliner Forum' started by PermanentTourist, May 10, 2019.

  1. Antinomian

    Antinomian Road Train Member

    1,200
    1,415
    Feb 17, 2013
    0

    A sticky valve can cause erratic results on the relative compression test. How long has it been since you ran the overhead?
     
    QUALITYTRUCK Thanks this.
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. PE_T

    PE_T Road Train Member

    Just have the dealer try to fix it. Once you have 4 codes, it’s going to be tough to try to fix it yourself. I have the Detroit repair instructions, but they contain a lot of technical terms. Take it to a dealer in a large city where they have a lot of technicians. Someone there is going to know how to solve it.
     
  4. Bek12345

    Bek12345 Bobtail Member

    10
    1
    Apr 23, 2020
    0
    Hi,

    I did valve adjustment first and after a month Freightliner did the cylinder compression check.
     
  5. Bek12345

    Bek12345 Bobtail Member

    10
    1
    Apr 23, 2020
    0
    Thanks for the suggestion! Will take it to bigger dealer
     
    PE_T Thanks this.
  6. Bek12345

    Bek12345 Bobtail Member

    10
    1
    Apr 23, 2020
    0

    Above codes coming and going off, but
    Yesterday i had new code came up
    spn 3720, fmi 15.

    Took the truck to my mechanic, said dpf filter full. Based on the above old symptoms, he said better change 1box iso putting new dpf filter. However, he said take it to the dealer and get the 6 fuel injectors checked first b4 putting new 1box.
     
  7. PE_T

    PE_T Road Train Member

    That is the code indicating that the DPFs are full.
     
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  • Draft saved Draft deleted