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EDC 3946 Fault in TGX 26440 MAN Truck After Intercooler Change

htcdesirerock 5880 10
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  • #1 20668882
    htcdesirerock
    Level 1  

    Hello guys, the intercooler was changed in my MAN truck. Now I have an EDC 3946 fault and can't find the problem. The truck is a TGX 26440. Thanks.
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  • #2 20669646
    darfur5
    Level 35  
    It's covered in this forum, you'll have to search for it
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  • #3 20669785
    TruckElectronica

    Level 23  

    htcdesirerock wrote:
    Intercooler has been replaced
    What do you mean exactly.
  • #4 20670758
    kakibara
    Level 34  
    Check the connection to the B623 sensor or later it
  • #5 20697870
    mitreaion19
    Level 1  

    Hello friend, please tell me more. I have the same error with my truck, model 12.290.
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  • #6 20710706
    ROKADI

    Level 22  
    SPN 3946 High Pressure Charge Air Cooler - Cooling
    charge air is not sufficient.
    Monitoring strategy:
    Control of the system of sensors and actuators.
    Customer acceptance/symptom description.
    Failure Mode Identification (FMI):
    FMI 0 - Unspecified error.
    OBD:
    OBD /
    P-Code:
    P1095 MIL ---
    Symptoms:
    Systemic response/possible effects:
    • Limit D08: 100 mg/stroke.
    Substitute reaction:
    ---
    Causes:
    Possible causes:
    ► Thermostat stuck in high pressure charge air cooler or malfunction
    Low Temperature Cooler Shutoff/Pressure Reducing Valve.
    End of document.
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  • #7 21579165
    Autotrade
    Level 2  
    Hey guys! What is the solution for this issue please?
  • #8 21579612
    kakibara
    Level 34  
    Salut prietene. Nu știu în ce etapă ești. Dar ar fi o idee bună să tragi senzorul din partea stângă, în spatele intercoolerului.Trebuie să verificați dacă nu este acoperit cu lichid de răcire - dacă este murdar, trebuie să verificați dacă radiatorul nu este deteriorat.
  • #9 21580631
    Autotrade
    Level 2  
    Hi! I've changed HP intercooler thermostats, pow p intercooler thermostats, fan clutch, temp sensor from the HP intercooler, electric valve from under the EGR valves! and same error when going uphill! pls help!!!
  • #10 21581039
    TruckElectronica

    Level 23  
    Maybe it's time to take the car to a workshop instead of doing experiments.....
  • #11 21581128
    Autotrade
    Level 2  
    It is at MAN SERVICE! They don’t know what else to do… all the work was done in a MAN dealership..
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Topic summary

The discussion revolves around an EDC 3946 fault encountered in a MAN TGX 26440 truck following an intercooler replacement. Users suggest checking the connection to the B623 sensor and provide insights into the fault's nature, indicating it relates to insufficient cooling of the charge air. One response details the fault code SPN 3946, which points to issues with the high-pressure charge air cooler, potentially caused by a stuck thermostat or malfunctioning pressure-reducing valve. Additional users express similar concerns with different truck models, indicating a broader relevance of the issue.
Summary generated by the language model.
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