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Thread: 2017 a4 fault code c123e hydraulic brake booster - limit value reached

  1. #1
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    2017 a4 fault code c123e hydraulic brake booster - limit value reached

    Hi, i have a fault with an a4 that i cant get any info on, any help would be appreciated. erwin vehicle specific info is down at the moment so hopefully someone has some knowledge on this fault.

    so far i have replaced the brake sevo/vac sensor but still no joy in getting the fault to erase.

    Mark

    Code:
    Wednesday,18,September,2019,17:42:29:21450
    VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
    VCDS Version: 19.6.1.0 (x64)  HEX-V2 CB: 0.4508.4
    Data version: 20190529 DS308.0
    www.Ross-Tech.com
    
    
    VIN: WAUZZZF44HA040130   License Plate: SO16PDV
    Mileage: 80519km-50032mi   Repair Order: 
    
    
    
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    
    
    Chassis Type: F4-AU49 (4M1)
    Scan: 01 03 08 09 15 16 17 19 29 2B 39 42 44 46 52 5F A5 AC BB BC
              D6 D7
    
    VIN: WAUZZZF44HA040130   Mileage: 80519km-50032miles
    
    01-Engine -- Status: OK 0000
    03-ABS Brakes -- Status: Malfunction 0010
    08-Auto HVAC -- Status: OK 0000
    09-Cent. Elect. -- 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
    29-Left Light -- Status: OK 0000
    2B-Steer. Col. Lock -- Status: OK 0000
    39-Right Light -- Status: OK 0000
    42-Door Elect, Driver -- Status: Malfunction 0010
    44-Steering Assist -- Status: OK 0000
    46-Central Conv. -- Status: OK 0000
    52-Door Elect, Pass. -- Status: OK 0000
    5F-Information Electr. -- Status: OK 0000
    A5-Frt Sens. Drv. Assist -- Status: OK 0000
    AC-Reductant Control -- Status: OK 0000
    BB-Door Rear Drv -- Status: OK 0000
    BC-Door Rear Pass -- Status: OK 0000
    D6-Light Ctrl Left 2 -- Status: OK 0000
    D7-Light Ctrl Right 2 -- Status: OK 0000
    -------------------------------------------------------------------------------
    Address 01: Engine (J623-DEUA)       Labels:. 04L-907-309-V1.clb
       Part No SW: 04L 906 026 A    HW: 04L 907 309 L
       Component: R4 2.0l TDI   H34 3332  
       Revision: B1H34---    
       Coding: 0A194032232405083408
       Shop #: WSC 06314 790 00001
       ASAM Dataset: EV_ECM20TDI01104L906026A 004006
       ROD: EV_ECM20TDI01104L906026_004.rod
       VCID: 280904C0327627E7A29-807C
    
    No fault code found.
    Readiness: 0 0 0 0 1 
    
    -------------------------------------------------------------------------------
    Address 03: ABS Brakes (J104)       Labels: 8W0-907-379-PLU-V1.clb
       Part No SW: 8W0 907 379 E    HW: 8W0 907 379 J
       Component: ESP9 Plus     H06 0593  
       Coding: 04AA1C9908A60A96159F4894007D5292E6C19620381050A812004A49678369
       Shop #: WSC 06324 790 00001
       ASAM Dataset: EV_ESP9BOSCHAU49X 012014
       ROD: EV_ESP9BOSCHAU49X_012.rod
       VCID: 47CBA77C9F28C89F4B3-8012
    
    1 Fault Found:
    15381504 - Bulb for Parking Light: Hydraulic Brake Boost 
              C123E F0 [175] - Limit Value Reached
              MIL ON - Confirmed - Tested Since Memory Clear
                 Freeze Frame:
                        Fault Status: 00000001
                        Fault Priority: 5
                        Fault Frequency: 1
                        Mileage: 80521 km
                        Date: 2019.09.18
                        Time: 17:08:09
    
                        7A 00 04 00 C2 00 00 00 00 00
    
    
    -------------------------------------------------------------------------------
    Address 08: Auto HVAC (E87)       Labels:* Redir Fail!
       Part No SW: 8W0 820 043 F    HW: 8W0 820 043 F
       Component: Klima Zone 3  H32 0071  
       Coding: 141800295544440D02000100880000000000000000000000000000000000
       Shop #: WSC 06325 790 00001
       ASAM Dataset: EV_AirCondiBHTCAU491 001013
       ROD: EV_AirCondiBHTCAU491.rod
       VCID: 3635DAB8E8C24117205-8062
    
       Fresh Air Blower Front: 
       Subsystem 1 - Part No SW: 4M2 820 021     HW: 4M2 820 021 
       Component: J216 FLuftV  H05 0001 
       Serial number: 00000000000000945228
    
       Relative humidity sensor in fresh air intake duct: 
       Subsystem 2 - Part No SW: 4H0 907 658 A    HW: 4H0 907 658 A
       Component: AQ_Hum_Sensor  H01 0005 
       Serial number: F3D8C83800PAG0MUFU02
    
       Rear Climatronic Operating And Display Unit: 
       Subsystem 3 - Part No SW: 8W0 919 158     HW: 8W0 919 158 
       Component: Klima Heck  H40 0073 
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 09: Cent. Elect. (J519)       Labels:* None
       Part No SW: 8W0 907 063 BF    HW: 8W0 907 063 BF
       Component: BCM1 MLBevo   H13 0248  
       Coding: 07501143E11800CD014487141B0C00B9110B3108000000000000000020001A810A450122025601
       Shop #: WSC 06325 790 00001
       ASAM Dataset: EV_BCM1BOSCHAU736 016006
       ROD: EV_BCM1BOSCHAU736_016.rod
       VCID: 00597C60FA863FA7CA9-8054
    
       Control Unit For Wiper Motor: 
       Subsystem 1 - Part No SW: 8W2 955 119     HW: 8V2 955 119 A  Labels: 1KX-955-119.CLB
       Component: WWS491 160531  043 0813 
       Serial number: 894253?0301615202617
       Coding: 5BC7F7
    
       Rain Light Recognition Sensor: 
       Subsystem 2 - Part No SW: 81A 955 555     HW: 81A 955 555 
       Component: G397_RLFSS  H06 0001 
       Serial number: 20067134X81A95555500
       Coding: 02005D
    
       Light switch: 
       Subsystem 3 - Part No SW: 4M0 941 531 AA    HW: 4M0 941 531 AA
       Component: E1 - LDS  H06 0008 
       Serial number: 07 05 2016  00345286
    
       Automatic Day Night Interior Mirror: 
       Subsystem 4 - Part No SW: 8W0 857 511     HW: 8W0 857 511 
       Component: Y7_Innenspieg  H09 0002 
       Serial number: GX1CE117051611521137
       Coding: 210000
    
       Interior Light Module: 
       Subsystem 5 - Part No SW: 8W0 947 135 D    HW: 8W0 947 135 
       Component: J528-Dachele  H14 0130 
       Serial number: B10192423           
    
       Convenience And Driver Assist Operating Unit: 
       Subsystem 6 - Part No SW: 8W0 925 301 BC    HW: 8W0 925 301 BC
       Component: SL-B9/Q5NF  H16 0010 
       Serial number: 2616000068458004    
       Coding: 000000
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 15: Airbags (J234)       Labels:| 8W0-959-655.clb
       Part No SW: 8W0 959 655     HW: 8W0 959 655 
       Component: Airbag10.44   H72 0086  
       Serial number: 003M6005948E
       Coding: AACCF0C00C800000585400F3C08C00000000
       Shop #: WSC 06325 790 00001
       ASAM Dataset: EV_AirbaAU10BPAAU736 005012
       ROD: EV_AirbaAU10BPAAU736_005_AU49.rod
       VCID: 06556A78D8A21197F05-8052
    
       Side Sensor Driver Front: 
       Subsystem 1 - Part No SW: -----------    HW: 442 062 806 16
       Component: SideSensor_Df  1E2 0887 
       Serial number: 3577Y00A11FACC32D2BJ
       Coding: 2D2D2D
    
       Side Sensor Passenger Front: 
       Subsystem 2 - Part No SW: -----------    HW: 442 062 806 16
       Component: SideSensor_Pf  1E2 0887 
       Serial number: 3587Y009D1FACC30F20K
       Coding: 2D2D2D
    
       Side Sensor Driver Rear: 
       Subsystem 3 - Part No SW: -----------    HW: 442 0B1 206 16
       Component: SideSensor_Dr  1C7 0148 
       Serial number: 3517700A52052194416T
       Coding: 2D2D2D
    
       Side Sensor Passenger Rear: 
       Subsystem 4 - Part No SW: -----------    HW: 442 0B1 206 16
       Component: SideSensor_Pr  1C7 0148 
       Serial number: 3527700A52052190A23U
       Coding: 2D2D2D
    
       Front Sensor Driver: 
       Subsystem 5 - Part No SW: -----------    HW: 442 0C1 606 16
       Component: FrontSensor_D  1C5 014A 
       Serial number: 3557500A920D33B32083
       Coding: 2D2D2D
    
       Front Sensor Passenger: 
       Subsystem 6 - Part No SW: -----------    HW: 442 0C1 606 16
       Component: FrontSensor_P  1C5 014A 
       Serial number: 3567500AB20D33B052CC
       Coding: 2D2D2D
    
       Pedestrian Protection Center: 
       Subsystem 7 - Part No SW: -----------    HW: 442 0C1 606 16
       Component: PedP_Sensor_C  1C5 014A 
       Serial number: 2307500A920D33B2431Z
       Coding: 2D2D2D
    
       Pedestrian Protection Driver 2: 
       Subsystem 8 - Part No SW: -----------    HW: 442 430 107 16
       Component: PedPSensor_D2  256 0887 
       Serial number: I0M9M00AD1F5EA34933W
       Coding: 2D2D2D
    
       Pedestrian Protection Passenger 2: 
       Subsystem 9 - Part No SW: -----------    HW: 442 430 107 16
       Component: PedPSensor_P2  256 0887 
       Serial number: I0N9M00A11FACC31030B
       Coding: 2D2D2D
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 16: Steering wheel (J527)       Labels: 4M0-907-129.clb
       Part No SW: 4M0 907 129 HA    HW: 4M0 907 129 HA
       Component: Lenks.Modul   H11 0009  
       ASAM Dataset: EV_SMLSKLOAU736 006008
       ROD: EV_SMLSKLOAU736_006.rod
       VCID: 76B51AB8A8420117E05-8022
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 17: Instruments (J285)       Labels:* Redir Fail!-SRI2
       Part No SW: 8W5 920 941 A    HW: 8W5 920 941 A
       Component: MMA4M17DIEUK  H06 0363  
       Revision: 0339v7      Serial number:    PY5FKG47S
       Coding: 24A4509028800600012069601000000000000000
       Shop #: WSC 06325 790 00001
       ASAM Dataset: EV_DashBoardAU736 001022
       ROD: EV_DashBoardAU736_AU49.rod
       VCID: 3E25C298C0F28957F85-806A
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 19: CAN Gateway (J533)       Labels:* None
       Part No SW: 4M1 907 468 C    HW: 4M1 907 468 A
       Component: Gateway       H15 0098  
       Revision: 4R040002    Serial number: 0244R002516704
       Coding: 0301000100008E40410700000059001248080007000000000100000000000000
       Shop #: WSC 06325 790 00001
       ASAM Dataset: EV_GatewCONTIAU736 002060
       ROD: EV_GatewCONTIAU736_002_AU49.rod
       VCID: 372BD7BCEFC8B81F3B3-8062
    
       Multi Function Steering Wheel Control Module: 
       Subsystem 1 - Part No SW: 8W0 951 523 C    HW: 8W0 951 523 C
       Component: J453 MFL  H02 0002 
       Serial number: 20160630202653 02531
    
       Battery Monitoring Control Module: 
       Subsystem 2 - Part No SW: 8S0 915 181 C    HW: 8S0 915 181 C
       Component: J367-BDMHella  H10 9070 
       Serial number: 7733300804          
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 29: Left Light (J1018)       Labels: 4M0-907-397.clb
       Part No SW: 4M0 907 397 AC    HW: 4M0 907 397 C
       Component: LCM_MLBevoH05 0023  
       ASAM Dataset: EV_LCMLeftHELLAAU736 001012
       ROD: EV_LCMLeftHELLAAU736_VW48.rod
       VCID: 78A91480A2567767F29-802C
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 2B: Steer. Col. Lock (J764)       Labels:* 5Q0-905-861.clb
       Part No SW: 3Q0 905 861 A    HW: 3Q0 905 861 A
       Component: ELV-MLBevo    H05 0032  
       Serial number: 16000143403008
       Coding: 0000000000000000
       Shop #: WSC 00000 000 00000
       ASAM Dataset: EV_ELVMarquMQBB 001007
       ROD: EV_ELVMarquMQBB.rod
       VCID: 323DE6A804AA5D370CD-8066
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 39: Right Light (J1023)       Labels: 4M0-907-397.clb
       Part No SW: 4M0 907 397 AC    HW: 4M0 907 397 C
       Component: LCM_MLBevoH05 0023  
       ASAM Dataset: EV_LCMRightHELLAAU736 001012
       ROD: EV_LCMLeftHELLAAU736_VW48.rod
       VCID: 78A91480A2567767F29-802C
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 42: Door Elect, Driver (J386)       Labels:* None
       Part No SW: 8W0 959 593 G    HW: 8W0 959 593 
       Component: TSG FS        005 0052  
       Serial number: 0000207992470 
       Coding: 001F8A204001000000001082
       Shop #: WSC 06325 790 00001
       ASAM Dataset: EV_DCU2DriveSideMAXHCONT 001005
       ROD: EV_DCU2DriveSideMAXHCONT_AU49.rod
       VCID: 4EC59258705219D7085-801A
    
    1 Fault Found:
    196660 - Motor for Window Regulator 
              B1487 54 [009] - Missing Calibration / Basic Setting
              Confirmed - Tested Since Memory Clear
                 Freeze Frame:
                        Fault Status: 00000001
                        Fault Priority: 5
                        Fault Frequency: 1
                        Reset counter: 104
                        Mileage: 80521 km
                        Date: 2019.09.18
                        Time: 17:08:12
    
    
    -------------------------------------------------------------------------------
    Address 44: Steering Assist (J500)       Labels:* None
       Part No SW: 8W0 909 144 F    HW: 8W0 909 144 B
       Component: EPS_MLBEVO_ZF H08 0407  
       Coding: 09000380008000
       Shop #: WSC 06324 790 00001
       ASAM Dataset: EV_EPSZFAU49X 002015
       ROD: EV_EPSZFAU49X_002.rod
       VCID: 40D9BC60BA06FFA78A9-8014
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 46: Central Conv. (J393)       Labels:* None
       Part No SW: 8W0 907 064 BB    HW: 8W0 907 064 B
       Component: BCM2 MLBevo   018 0328  
       Coding: 012D00002F100000630180000600000031020010004302500F04000000040030001F0001000000
       Shop #: WSC 06325 790 00001
       ASAM Dataset: EV_BCM2HellaAU736 011012
       ROD: EV_BCM2HellaAU736_011_AU49.rod
       VCID: 7DA705948D74524FA1F-8028
    
       Sensor For Anti Theft Alarm System: 
       Subsystem 1 - Part No SW: 5Q0 951 177     HW: 5Q0 951 172 
       Component: Sensor, DWA  005 0316 
       Serial number: 000000000ZY161602J40
    
       Alarm horn: 
       Subsystem 2 - Part No SW: 5Q0 951 605 A    HW: 5Q0 951 605 A
       Component: Sirene, DWA  005 0313 
       Serial number: 00000000000035980839
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 52: Door Elect, Pass. (J387)       Labels:* None
       Part No SW: 8W0 959 592 G    HW: 8W0 959 592 
       Component: TSG BFS       005 0052  
       Serial number: 0000207623228 
       Coding: 001F8A204001000000001080
       Shop #: WSC 06325 790 00001
       ASAM Dataset: EV_DCU2PasseSideMAXHCONT 001005
       ROD: EV_DCU2PasseSideMAXHCONT_AU49.rod
       VCID: 4DC795547D5422CF71F-8018
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 5F: Information Electr. (J794)       Labels:* 8W0-035-MIB-HGS2.clb
       Part No SW: 8W0 035 192 A    HW: 8W0 035 192 A
       Component: MU-HS-LND-EU  045 0148  
       Serial number:               
       Coding: 01940101FF0A000013111101000A00102F0001C601F00100CE
       Shop #: WSC 06325 790 00001
       ASAM Dataset: EV_MUHigScl6C3DELP 001011
       ROD: EV_MUHigScl6C3DELP.rod
       VCID: 3431E0B0FEBE53071E1-8060
    
       Data medium: 
       Subsystem 1 - Part No SW: V03 959 801 PC    HW: -----------
       Component: ECE 2016/2017  --- 0020 
       Serial number: --------------------
    
       Display unit 1 for multimedia system: 
       Subsystem 2 - Part No SW: 8W2 919 604     HW: 8W2 919 604 
       Component: AU49x_DU_STD  H40 0008 
       Serial number: AUZ8Z9GBH00CCX      
    
       Multimedia Operating Unit: 
       Subsystem 3 - Part No SW: 8W0 919 614 J    HW: 8W0 919 614 J
       Component: ControlUnit_B  H21 0134 
       Serial number: APVAK116061600020065
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address A5: Frt Sens. Drv. Assist (R242)       Labels:* Redir Fail!
       Part No SW: 8W0 907 217 B    HW: 8W0 907 217 
       Component: BVS           H14 0042  
       Coding: 0404090100000403024023A0A40000FC00F0C020C000
       Shop #: WSC 06325 790 00001
       ASAM Dataset: EV_BVSMLBevKOSTAAU736 002026
       ROD: EV_BVSMLBevKOSTAAU736_AU49.rod
       VCID: 3B23CB8CD3E09C7FDFB-806E
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address AC: Reductant Control (J880)       Labels: 4M0-907-355.clb
       Part No SW: 4M0 907 355     HW: 4M0 907 355 
       Component: SCR-Stg-G3H10 0003  
       ASAM Dataset: EV_RDCMINERGAU736 005009
       ROD: EV_RDCMINERGAU736_AU49.rod
       VCID: 6E8532D8D01239D7285-803A
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address BB: Door Rear Drv (J388)       Labels:* None
       Part No SW: 8W0 959 595 G    HW: 8W0 959 595 
       Component: TSG HFS       005 0052  
       Serial number: 0000208145078 
       Coding: 000F88200001000000001080
       Shop #: WSC 06325 790 00001
       ASAM Dataset: EV_DCU2RearDriveMAXHCONT 001005
       ROD: EV_DCU2RearDriveMAXHCONT_AU49.rod
       VCID: 50F98C206A660F271A9-8004
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address BC: Door Rear Pass (J389)       Labels:* None
       Part No SW: 8W0 959 595 G    HW: 8W0 959 595 
       Component: TSG HBFS      005 0052  
       Serial number: 0000208145146 
       Coding: 000F88200001000000001080
       Shop #: WSC 06325 790 00001
       ASAM Dataset: EV_DCU2RearPasseMAXHCONT 001005
       ROD: EV_DCU2RearPasseMAXHCONT_AU49.rod
       VCID: 50F98C206A660F271A9-8004
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address D6: Light Ctrl Left 2 (A31)       Labels: 7PP-941-572.clb
       Part No SW: 7PP 941 572 AB    HW: 7PP 941 572 A
       Component: LED1L         H09 0003  
       Shop #: WSC 00000 000 00000
       ASAM Dataset: EV_LEDModLeftMELCOAU736 001004
       ROD: EV_LEDModLeftMELCOAU736_VW37.rod
       VCID: 16753A388802A117005-8042
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address D7: Light Ctrl Right 2 (A27)       Labels: 7PP-941-572.clb
       Part No SW: 7PP 941 572 AB    HW: 7PP 941 572 A
       Component: LED1R         H09 0003  
       Shop #: WSC 00000 000 00000
       ASAM Dataset: EV_LEDModRightMELCOAU736 001004
       ROD: EV_LEDModLeftMELCOAU736_VW37.rod
       VCID: 16753A388802A117005-8042
    
    No fault code found.
    
    End----------(Elapsed Time: 01:33, VBatt start/end: 12.2V/12.2V)-----------

  2. #2
    Ross-Tech Employee DrPeter's Avatar
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    Hello,

    Thanks for posting the vehicle's Auto-Scan! By the way, the VIN says this is a 2017 WAUZZZF44HA040130 [H = 2017]
    Date of production: 21.07.2016
    Model year: 2017

    I would suggest to have a look at the Advanced Measuring Values in the J104-ABS Controller for the [Pressure in brake booster] and see what it is reading.

    With the engine idling, the G608-Vacuum Sensor should be around [-800 to -950mbar] providing there is a decent amount of vacuum at the brake booster.
    - The value should change when the pressure (positive or negative) changes.

    If not, check the wiring, connections for any concerns, including but not limited to coolant migration and or corrosion.

    Hope this helps,

    drpeter

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  4. #3
    Benevolent Dictator Uwe's Avatar
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    Quote Originally Posted by DrPeter View Post
    By the way, the VIN says this is a 2017 WAUZZZF44HA040130 [H = 2017]
    I've fixed the thread title.

    -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.

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  6. #4
    Verified VCDS User
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    turns out its a flaw in the abs software that does not allow this fault to clear after it has been seen too many times. apparently the only way to fix it is to fit a new module.

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