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What makes Dpf and SCR exhaust hotter for regent

Discussion in 'Volvo Forum' started by JefJak, Mar 20, 2022.

  1. Mar 20, 2022 #1
    JefJak

    JefJak Bobtail Member

    2
    0
    Aug 29, 2019
    0
    Does anybody knows what controls the temperature to the Dpf and SCR beside the & injector and AHI.
    i am having a problem doing regent th exhaust does get hotter then 245F in bank 1 and 230F in bank2.
    i replaced 7 injector ,AHI module and the valve after air dryer that send air to the Module and nothing seem to be working.
     
    JefJak, Mar 20, 2022
    JefJak, Mar 20, 2022
    #1
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  3. Mar 21, 2022 #2
    uncleal13

    uncleal13 Road Train Member

    3,797
    6,294
    Apr 9, 2009
    Humboldt, Sk
    0
    Um, I thought it should be way hotter than that, like 800-1200 degrees depending on the regeneration routine running at the moment.
     
    uncleal13, Mar 21, 2022
    uncleal13, Mar 21, 2022
    #2
  4. Mar 21, 2022 #3
    QUALITYTRUCK

    QUALITYTRUCK Road Train Member

    1,804
    1,765
    Jun 14, 2009
    romulus,mi
    0
    Stop just replacing things and have truck properly diagnosed. With the great information that you supplied (year/make/model/engine) I have to believe that you will get all kinds of help.........
     
    QUALITYTRUCK, Mar 21, 2022
    QUALITYTRUCK, Mar 21, 2022
    #3
    AModelCat, Socal Xpress and loudtom Thank this.
  5. Mar 29, 2022 #4
    Truckwork2461

    Truckwork2461 Bobtail Member

    47
    14
    Feb 10, 2021
    0
    Are there any exhaust leaks?

    Usually the first cause of failure is the engine fuel injectors which then leads to the dpf/doc clogging and failure. Have the dpf and doc been flow tested? They could be bad or clogged and require cleaning. Dealers will clean, flow test, and visually inspect them to see if they need replacement.

    Also, if the regen hasn’t been running right for some time it can impact the exhaust manifold (could be leaking/clogged), turbo charger, and eventually lead to engine failure.

    I would have all the complete engine and exhaust system assessed.
     
    Truckwork2461, Mar 29, 2022
    Truckwork2461, Mar 29, 2022
    #4
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