W221 Fault Code Help

Discussion in 'Engine' started by 722, May 9, 2017.

  1. 722

    722 New Member

    Messages:
    7
    Joined:
    May 20, 2014
    Car:
    W221
    Does anyone know what the following fault codes apply to;

    3019
    3021

    They were checked on a Non-Star scanner and accidentally cleared before I could get it on a Star unit. Would the fault codes be stored for Star?

    I have looked around and can't seem to find these particular codes, irrespective of a letter prefix. I am assuming its P (powertrain).

    Many thanks
     
  2. SUPERNOVA1a

    SUPERNOVA1a Hardcore MB Enthusiast

    Messages:
    154
    Joined:
    Mar 17, 2017
    Location:
    Smethwick
    Car:
    Mercedes S63 BiTurbo 2012. LEXUS LS400. JENSEN INTERCEPTOR Mk3 8.2
    3019=B3019 There is this fault code "Door key switches(LF RF) circuit High.
    3021=B3021 Fuel enable circuit malfunction
    These are showing as "Generic, This code applies to all makes and models/ no manufacture specific record.
     
    1 person likes this.
  3. BlackC55

    BlackC55 Authorised Forum Sponsor Authorised Forum Sponsor

    Messages:
    18,707
    Joined:
    Feb 8, 2007
    Location:
    Horndean, Portsmouth, Hampshire, Southsea
    Car:
    C43 AMG with a 55 engine and supercharger, E55 AMG, S500, etc
    What are the symptoms?
     
  4. OP
    OP
    722

    722 New Member

    Messages:
    7
    Joined:
    May 20, 2014
    Car:
    W221
    Many thanks for the quick replies.

    There are no symptoms with the car, just after normal ignition the Check Engine Light appeared on the dashboard. Since then it hasn't reappeared.
     
  5. OP
    OP
    722

    722 New Member

    Messages:
    7
    Joined:
    May 20, 2014
    Car:
    W221
    I think this changes depending on which website or list of OBD2 codes you refer to. I have seen this come up with a title of GM, I am ssuming General Motors.

    On another site I have seen them come as;

    B3019 - specifically refers to the camshaft (cam) timing. In this case, if the cam timing is over-retarded, the engine light will be illluminated and the code will be set.

    B3021 - engine trouble code is about Exhaust Gas Recirculation Sensor B Circuit High.

    Can anyone shed any more light or confirm which ones are specific to Mercedes?

    Many thanks
     
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