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Thread: A6 4F Running Rough after changing Brake Pads

  1. #1
    Join Date
    Jan 2009
    Location
    Blue Mountains, NSW
    Posts
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    Thanked: 52

    Default A6 4F Running Rough after changing Brake Pads

    This one has me stumped. I changed the brake pads on my A6 4F on the weekend. Changed the fronts first. Took the car around the block to to make sure the brakes feel right, and they did. Car started and ran fine. Then went to do the back. Opened the parking brakes with VCDS, changed the pads, then closed the parking brakes with VCDS. Started the car and it was spluttering and the engine light was on. Drove it around the block and while it went, it was clearly underpowered (ESP came on and off since it was underpowered). In the morning it started and ran fine. Then in the afternoon it ran rough. The only thing in between with VCDS was opening and closing the parking brakes. The brakes are all working well and the parking brake is working correctly. Any suggestions?

    Current:
    2004 A6 C5 Sedan 3.0 V6 Quattro
    2005 A6 4F Sedan 3.2 V6 Quattro
    1999 A4 B5 Avant 2.4 V6 (Unreg)

    Retired:
    1990 100 Sedan 2.3
    1991 90 Sedan 2.3
    1999 A4 B5 Sedan 2.4 V6

  2. #2
    Join Date
    Feb 2005
    Location
    Melbourne
    Posts
    9,891
    Thanked: 459

    Default

    Have you run a scan for fault codes?

    The changing of the brakes should have no impact on the symptoms the car is now experiencing.

  3. #3
    Join Date
    Jan 2009
    Location
    Blue Mountains, NSW
    Posts
    2,009
    Thanked: 52

    Default

    Just scanned the car. The thing is that after changing the front pads the car started and ran fine. It was only after the rear pads that it started to run rough.
    I've cut out all the no-fault sections because the whole scan exceeded the 20k character limit.




    Thursday,29,April,2021,19:46:01:19577
    VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x64
    VCDS Version: 21.3.0.0 (x64)
    Data version: 20210226 DS325.0
    www.Ross-Tech.com




    VIN: WAUZZZ4F15N109574 License Plate:
    Mileage: 145960km-90695mi Repair Order:




    Chassis Type: 4F (4F0)
    Scan: 01 02 03 05 07 08 09 0E 15 16 17 19 37 42 46 47 4F 52 53 56
    57 61 62 72 76 77


    VIN: WAUZZZ4F15N109574 Mileage: 145960km-90695miles


    00-Steering Angle Sensor -- Status: OK 0000
    01-Engine -- Status: Malfunction 0010
    02-Auto Trans -- Status: Malfunction 0010
    03-ABS Brakes -- Status: OK 0000
    05-Acc/Start Auth. -- Status: OK 0000
    07-Control Head -- Status: Malfunction 0010
    08-Auto HVAC -- Status: OK 0000
    09-Cent. Elect. -- Status: OK 0000
    0E-Media Player 1 -- Status: OK 0000
    15-Airbags -- Status: OK 0000
    16-Steering wheel -- Status: OK 0000
    17-Instruments -- Status: OK 0000
    19-CAN Gateway -- Status: OK 0000
    25-Immobilizer -- Status: OK 0000
    37-Navigation -- Status: OK 0000
    42-Door Elect, Driver -- Status: OK 0000
    46-Central Conv. -- Status: OK 0000
    47-Sound System -- Status: OK 0000
    4F-Centr. Electr. II -- Status: OK 0000
    52-Door Elect, Pass. -- Status: OK 0000
    53-Parking Brake -- Status: OK 0000
    56-Radio -- Status: OK 0000
    57-TV Tuner -- Status: OK 0000
    61-Battery Regul. -- Status: Malfunction 0010
    62-Door, Rear Left -- Status: OK 0000
    72-Door, Rear Right -- Status: OK 0000
    76-Park Assist -- Status: OK 0000
    77-Telephone -- Status: OK 0000

    -------------------------------------------------------------------------------
    Address 01: Engine (AUK) Labels:. 06E-910-559-BKH.clb
    Part No SW: 4F1 910 559 N HW: 4F1 907 559
    Component: 3.2l V6 FSI 0040
    Revision: --H15--- Serial number:
    Coding: 01050003190F0120
    Shop #: WSC 02325 785 00200
    VCID: 3669053F410B043B29-8062


    10 Faults Found:
    008304 - Intake Manifold Tuning Valve (Bank 1)
    P2070 - 006 - Stuck Open
    Freeze Frame:
    Fault Status: 00100001
    Fault Priority: 2
    Fault Frequency: 254
    Reset counter: 40
    Mileage: 135259 km
    Time Indication: 0
    Date: 2020.09.04
    Time: 12:19:01


    Freeze Frame:
    RPM: 1216 /min
    Mass Air / Rev.: 452.4 mg/str
    Temperature: 30.0C
    Part Throttle
    Absolute Pres.: 931.0 mbar
    Speed: 0.0 km/h


    004506 - Fuel Pressure Sensor (G247)
    P119A - 007 - Malfunction - Intermittent
    Freeze Frame:
    Fault Status: 00100010
    Fault Priority: 2
    Fault Frequency: 1
    Reset counter: 12
    Mileage: 144350 km
    Time Indication: 0
    Date: 2021.02.27
    Time: 14:05:57


    Freeze Frame:
    RPM: 3328 /min
    Mass Air / Rev.: 615.9 mg/str
    Temperature: 87.0C
    Part Throttle
    Pressure: 79.8 bar
    Speed: 99.0 km/h


    005634 - Power Supply Terminal 30
    P1602 - 008 - Voltage too Low - Intermittent
    Freeze Frame:
    Fault Status: 00001000
    Fault Priority: 2
    Fault Frequency: 3
    Reset counter: 40
    Mileage: 145921 km
    Time Indication: 0


    Freeze Frame:
    RPM: 0 /min
    Mass Air / Rev.: 0.0 mg/str
    Temperature: 30.0C
    Engine Off
    Load: 0.0 %
    Speed: 0.0 km/h


    005715 - Please check DTC Memory of ABS Controller
    P1653 - 008 - - Intermittent
    Freeze Frame:
    Fault Status: 00101000
    Fault Priority: 2
    Fault Frequency: 8
    Reset counter: 40
    Mileage: 145921 km
    Time Indication: 0
    Date: 2021.03.27
    Time: 12:54:11


    Freeze Frame:
    RPM: 1600 /min
    Mass Air / Rev.: 256.2 mg/str
    Temperature: 85.5C
    Part Throttle
    Load: 34.9 %
    Speed: 75.0 km/h


    000833 - Camshaft Position Sensor (G40)
    P0341 - 006 - Implausible Signal - MIL ON
    Freeze Frame:
    Fault Status: 10100001
    Fault Priority: 4
    Fault Frequency: 12
    Reset counter: 40
    Mileage: 145922 km
    Time Indication: 0
    Date: 2021.04.25
    Time: 13:27:57


    Freeze Frame:
    RPM: 928 /min
    Mass Air / Rev.: 387.0 mg/str
    Temperature: 30.0C
    Part Throttle
    Bin. Bits: 00010000
    Speed: 0.0 km/h


    000870 - Camshaft Position Sensor B Bank 1 (G300)
    P0366 - 006 - Implausible Signal - MIL ON
    Freeze Frame:
    Fault Status: 10100001
    Fault Priority: 4
    Fault Frequency: 12
    Reset counter: 40
    Mileage: 145922 km
    Time Indication: 0
    Date: 2021.04.25
    Time: 13:27:57


    Freeze Frame:
    RPM: 992 /min
    Mass Air / Rev.: 387.0 mg/str
    Temperature: 30.0C
    Part Throttle
    Bin. Bits: 00010000
    Speed: 0.0 km/h


    004440 - Manifold Pressure Sensor (G71)
    P1158 - 007 - Implausible Signal
    Freeze Frame:
    Fault Status: 00100010
    Fault Priority: 2
    Fault Frequency: 2
    Reset counter: 40
    Mileage: 145922 km
    Time Indication: 0
    Date: 2021.04.25
    Time: 13:31:52


    Freeze Frame:
    RPM: 1696 /min
    Mass Air / Rev.: 218.0 mg/str
    Temperature: 48.0C
    Part Throttle
    Voltage: 13.97 V
    Speed: 25.0 km/h


    000104 - MAP/MAF <-> Throttle Position Correlation
    P0068 - 006 -
    Freeze Frame:
    Fault Status: 00000001
    Fault Priority: 5
    Fault Frequency: 2
    Reset counter: 40
    Mileage: 145922 km
    Time Indication: 0
    Date: 2021.04.25
    Time: 13:31:52


    Freeze Frame:
    RPM: 1696 /min
    Mass Air / Rev.: 207.1 mg/str
    Temperature: 48.0C
    Part Throttle
    Voltage: 14.08 V
    Bin. Bits: 00000010


    000769 - Cylinder 1
    P0301 - 006 - Misfire Detected
    Freeze Frame:
    Fault Status: 00000001
    Fault Priority: 6
    Fault Frequency: 5
    Reset counter: 40
    Mileage: 145922 km
    Time Indication: 0
    Date: 2021.04.25
    Time: 13:32:06


    Freeze Frame:
    RPM: 1568 /min
    Mass Air / Rev.: 190.8 mg/str
    Temperature: 85.5C
    Part Throttle
    Time: 3072.0 s
    Speed: 75.0 km/h


    005648 - Internal Control Module
    P1610 - 006 - Memory Check Sum Error - Intermittent
    Freeze Frame:
    Fault Status: 00000001
    Fault Priority: 4
    Fault Frequency: 1
    Reset counter: 40
    Mileage: 1542 km
    Time Indication: 0
    Date: 2001.08.03
    Time: 00:24:12


    Freeze Frame:
    RPM: 192 /min
    Mass Air / Rev.: 21.8 mg/str
    Temperature: -43.5C
    Load: 2.4 %
    Speed: 6.0 km/h


    Readiness: 0000 0000


    -------------------------------------------------------------------------------
    Address 02: Auto Trans Labels: 09L-927-760.lbl
    Part No SW: 4F1 910 156 H HW: 09L 927 156
    Component: AG6 09L 3.2 FSI RdW 0020
    Revision: --H01--- Serial number: 4009299
    Coding: 0000001
    Shop #: WSC 02325 785 00200
    VCID: 2953DE4380B55BC3B4-807C


    1 Fault Found:
    18274 - Powertrain Data Bus
    P1866 - 000 - Missing Messages - Intermittent
    Freeze Frame:
    Fault Status: 00110000
    Fault Priority: 0
    Fault Frequency: 1
    Reset counter: 40
    Mileage: 145969 km
    Time Indication: 0
    Date: 2021.04.29
    Time: 20:35:48


    Freeze Frame:
    RPM: 0 /min
    RPM: 0 /min
    RPM: 0 /min
    (no units): 30.0
    (no units): 25.0
    Temperature: 18.0C
    T.B. Angle: 60.0




    -------------------------------------------------------------------------------
    Address 07: Control Head Labels: 4F0-910-7xx-07-H.clb
    Part No SW: 4F1 910 732 E HW: 4E0 035 729 A
    Component: Interfacebox H43 5570
    Revision: 00000000 Serial number: 393CE057501024
    Coding: 0000002
    Shop #: WSC 02335 785 00200
    VCID: 2649D57F91AB74BB99-8072


    Subsystem 1 - Part No: 4F0 910 609 B
    Component: Bedienteil MMIC6H03 0010


    Subsystem 2 - Serial number: 00000000120721


    Subsystem 3 - Serial number: 0107.03.050000000100010394


    Subsystem 4 - Serial number: 010394


    2 Faults Found:
    02084 - Component Protection
    005 - No or Incorrect Basic Setting / Adaptation
    Freeze Frame:
    Fault Status: 01100101
    Fault Priority: 5
    Fault Frequency: 1
    Reset counter: 101
    Mileage: 136285 km
    Time Indication: 0
    Date: 2020.10.04
    Time: 08:43:54


    02095 - Component Protection Active
    000 - -
    Freeze Frame:
    Fault Status: 01100000
    Fault Priority: 5
    Fault Frequency: 1
    Reset counter: 91
    Mileage: 145969 km
    Time Indication: 0
    Date: 2021.04.29
    Time: 20:35:33



    -------------------------------------------------------------------------------
    Address 61: Battery Regul. Labels: 4F0-910-181.lbl
    Part No SW: 4F0 910 181 E HW: 4F0 915 181 A
    Component: ENERGIEMANAGER H12 0490
    Revision: 00000000 Serial number: 00000000029332
    Shop #: WSC 20110 822 84911
    VCID: 234FCC6BE2998193FE-8076


    Subsystem 1 - Part No: 4F0 915 105 C
    Component: von VA0 301010A08G
    Coding: 344630393135313035432056413033303130313041303847
    Shop #: WSC 51671 000 1048576


    4 Faults Found:
    02273 - Quiescent Current Stage 2
    000 - - - Intermittent
    Freeze Frame:
    Fault Status: 00100000
    Fault Priority: 7
    Fault Frequency: 1
    Reset counter: 255
    Mileage: 145969 km
    Time Indication: 0
    Date: 2021.04.29
    Time: 20:39:00


    02276 - Quiescent Current Stage 5
    000 - - - Intermittent
    Freeze Frame:
    Fault Status: 00100000
    Fault Priority: 7
    Fault Frequency: 1
    Reset counter: 255
    Mileage: 145969 km
    Time Indication: 0
    Date: 2021.04.29
    Time: 20:39:11


    02274 - Quiescent Current Stage 3
    000 - - - Intermittent
    Freeze Frame:
    Fault Status: 00100000
    Fault Priority: 7
    Fault Frequency: 1
    Reset counter: 255
    Mileage: 145969 km
    Time Indication: 0
    Date: 2021.04.29
    Time: 20:39:21


    02277 - Quiescent Current Stage 6
    000 - - - Intermittent
    Freeze Frame:
    Fault Status: 00100000
    Fault Priority: 7
    Fault Frequency: 1
    Reset counter: 255
    Mileage: 145969 km
    Time Indication: 0
    Date: 2021.04.29
    Time: 20:39:31



    End-------------------------(Elapsed Time: 02:28)--------------------------

    Current:
    2004 A6 C5 Sedan 3.0 V6 Quattro
    2005 A6 4F Sedan 3.2 V6 Quattro
    1999 A4 B5 Avant 2.4 V6 (Unreg)

    Retired:
    1990 100 Sedan 2.3
    1991 90 Sedan 2.3
    1999 A4 B5 Sedan 2.4 V6

  4. #4

    Default

    My guess is the the timing was coincidental and the CEL has nothing to do with having released the parking brake.

  5. #5
    Join Date
    Jan 2009
    Location
    Blue Mountains, NSW
    Posts
    2,009
    Thanked: 52

    Default

    Update: The timing chains are out so probably/likely something's now damaged in the top end. The cost to fix the chains, diagnose consequential faults and repair will likely be more than I'm happy to part with so I think I'll have to let it RIP and start looking for another car. The missus wants a ..... TOYOTA!! Can't blame her, my runaround is a 95 Hilux diesel with 480k.

    Current:
    2004 A6 C5 Sedan 3.0 V6 Quattro
    2005 A6 4F Sedan 3.2 V6 Quattro
    1999 A4 B5 Avant 2.4 V6 (Unreg)

    Retired:
    1990 100 Sedan 2.3
    1991 90 Sedan 2.3
    1999 A4 B5 Sedan 2.4 V6

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