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MAN D2848 alarms issue

Discussion in 'Engines' started by Felix Perdomo, Jan 24, 2021.

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  1. Felix Perdomo, Jan 24, 2021
    #1
    Felix Perdomo

    Felix Perdomo New Member

    Joined:
    Jan 22, 2021
    Messages:
    2
    Location:
    venezuela
    Hi!! I'm new in the forum. I have an issue with my MAN d2848 LE423 my display shows 4 alarms. Oil pressure, fuel pressure, transmission and sffr/EDC also speed sensor failure, I checked all the sensor and everything is ok also I swap MMDS, SFFR, motherboard and MASTER/SLAVE with the other engine and the problem is still there. Someone had the same problem like me. Thanks guys

    PD: I scan the engine and It shows no fault code
  2. Capt J, Jan 24, 2021
    #2
    Capt J

    Capt J Senior Member

    Joined:
    Jul 11, 2005
    Messages:
    14,529
    Location:
    Fort Lauderdale
    I have seen this erroneous alarm issues if the battery bank is either in poor condition (old batteries). Or the battery charger is leaking AC voltage into the battery bank. I have also seen it if one of the sensors is bad, sometimes it will cause the computer to say multiple sensors are bad.
  3. mapism, Jan 24, 2021
    #3
    mapism

    mapism Senior Member

    Joined:
    Aug 9, 2008
    Messages:
    2,166
    Location:
    Sardinia
    I am sorry to sound scaremongering, but that specific engine model is among the very first where MAN introduced CRM (THE first on V8 block), and it's notorious for all sort of electronic faults, often hard to diagnose even for official dealers.
    I wouldn't dare trying any DIY fixing on them, unless you are a trained MAN specialist.
    And even in that case, good luck!