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Thread: DTC description and freeze frame

  1. #1
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    DTC description and freeze frame

    Hi,
    I have a few question about scan report in Audi A6. Mileage: 86822km-53948mi

    For example, VCDS read fault in Engine module:

    13272 - Catalyst System; Bank 1
    P0420 00 [237] - Efficiency Below Threshold
    MIL ON - Confirmed - Tested Since Memory Clear
    Freeze Frame:
    Fault Status: 00000001
    Fault Priority: 2
    Fault Frequency: 3
    Mileage: 81982 km
    Date: 2019.11.19
    Time: 13:01:15

    My questions:
    1. Faults status (color green) is not the same as fault desctription (color red). Why?

    This Fault status value: 00000001- active By using desctription from forum.

    Is different from this:
    MIL ON - Confirmed - Tested Since Memory Clear

    2. My thinking is correct?:

    MIL ON - Confirmed - Tested Since Memory Clear- it is a moment when the fault was record
    Fault Status: 00000001- it is a moment when I do the scan with VCDS
    That is right?

    3. Fault Status: 00000001 Means that fault is active. Is it still active since when it was recorded in 2019.11.19 time 13:01:15

    4. Have you newest dectription for value: [237] -? And VCDS Fault Anathomy>

    On forum is only old.

    Best regards

  2. #2
    Benevolent Dictator Uwe's Avatar
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    The stuff in red comes from the bits in the [237].

    The Freeze-Frame data, including the status and priority is pulled separately from the fault code itself.

    -Uwe-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

  3. #3
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    Quote Originally Posted by Uwe View Post
    The stuff in red comes from the bits in the [237].

    The Freeze-Frame data, including the status and priority is pulled separately from the fault code itself.

    -Uwe-
    Hi, I know that.

    I don't know:
    MIL ON - Confirmed - Tested Since Memory Clear- it is a moment when the fault was record?
    Fault Status: 00000001- it is a moment when I do the scan with VCDS?

    It looks like this parameters: [237] and Fault Status display values in different moments in the DTC.

  4. #4
    NostraJackAss Jack@European_Parts's Avatar
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    Could you not cross check by creating and clearing DTC's and counting the last time stamp to answer your own question?

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