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W205 C300H 2015 n0x Sensor Failure

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by Abzkay300h, Jul 9, 2019.

  1. Abzkay300h

    Abzkay300h New Member

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    Joined:
    Jun 29, 2019
    Your Mercedes:
    C300H W205 2015
    hope you are well,

    I recently purchased a C300H and had the fault code P229F62 in which the trader I purchased from fixed (supposedly). They replaced the n0x Sensor and did an update.

    However literally 50 miles in I have a code P2201E5 in which it does clear at times with a simple diagnostic reset.

    Recently went in MB who performed a software updated on the Powertrain System. They did not replace the wiring harness as they said mine is fine.

    This is becoming a common reoccurring incident and was wondering if this is something you have come across.


    Many thanks
     

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  2. OP
    Abzkay300h

    Abzkay300h New Member

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    Joined:
    Jun 29, 2019
    Your Mercedes:
    C300H W205 2015
    Sorry furthermore went into MB for recall for software updates waiting harness was not done as they claimed was fine.
     
  3. alexanderfoti

    alexanderfoti MBO Forum Supporter Authorised Forum Supporter

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    Joined:
    Mar 25, 2010
    Location:
    Dartford
    Your Mercedes:
    W221 S65 AMG - W204 C63 AMG + Various other MB's
    Yes this is a common issue. Software update fixes about 50% of them. The others are affected with already up to date software. There are 2-3 different versions of nox fault codes which dictate different repair options.
     

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