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Thread: Overboost on new to me Audi A4 2008 B7

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  1. #1
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    Mar 2019
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    USA
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    Overboost on new to me Audi A4 2008 B7

    I bought this car and it is my first dive into the world of turbo chargers. The car sets with over 180,000 miles and I'm getting an overboost code. When I bought the car it popped up on me and I cleared it and it took over 400 miles before it came back. I'm have done some looking into this charging system but am still very new to this stuff. I'm worried that the car might have an aftermarket turbo or some new fuel maps because when I stepped on the gas it will boost up to about 18 psi and it did this constantly for weeks without throwing a code. From what I can tell the car should be running at 12 psi max and should trip engine lights if it ever gets up to 14 psi or higher. From what I can tell I tell I need to pull the turbo off and clean out the turbo fins (I'm about to do the vacuum testing on this to check if it is really froze up) but I don't want to dive into this without asking you people because I'm not 100% sure yet. Does anyone have any suggestions?

    Here is my Auto-Scan. I believe the miss-fires are a symptom of the issue and not a cause:

    Code:
    Saturday,20,April,2019,10:09:25:63335
    VCDS -- Windows Based VAG/VAS Emulator Running on Windows 8.1 x64
    VCDS Version: 18.9.1.0 (x64)  HEX-V2 CB: 0.4437.4
    Data version: 20190114 DS296.0
    www.Ross-Tech.com
    
    
    VIN: WAUDF78E88A116185   License Plate: 
    
    
    Chassis Type: 8E (8E - Audi A4/S4/RS4 B6/B7 (2001 > 2008))
    Scan: 01 02 03 08 09 0F 11 15 16 17 18 25 36 37 45 46 55 56 57 65
              67 69 75 76 77
     
    VIN: WAUDF78E88A116185   Mileage: 296460km-184211miles
    -------------------------------------------------------------------------------
    Address 01: Engine        Labels:. 06F-907-115-AXX.clb
       Part No SW: 8E1 910 115 G    HW: 8E0 907 115 D
       Component: 2.0l R4/4V TFSI     0010  
       Revision: 5EH15---    Serial number: XXXXXXXXXXXXXX
       Coding: 0104010A180F0120
       Shop #: WSC 06335 000 00000
       VCID: 2615F796B4E87B47C41-8072
    
    4 Faults Found:
    000051 - Turbocharger Bypass Valve Control Circuit 
                   P0033 - 004 - Malfunction / Open Circuit
                 Freeze Frame:
                        Fault Status: 01100100
                        Fault Priority: 2
                        Fault Frequency: 2
                        Reset counter: 255
                        Mileage: 294327 km
                        Time Indication: 0
    
                 Freeze Frame:
                        RPM: 848 /min
                        Load: 26.3 %
                        Speed: 0.0 km/h
                        Temperature: 12.0°C
                        Temperature: 0.0°C
                        Absolute Pres.: 1000.0 mbar
                        Voltage: 14.351 V
    
    000768 - Random/Multiple Cylinder Misfire Detected 
                   P0300 - 001 -  - Intermittent
                 Freeze Frame:
                        Fault Status: 00100001
                        Fault Priority: 2
                        Fault Frequency: 1
                        Reset counter: 255
                        Mileage: 295242 km
                        Time Indication: 0
    
                 Freeze Frame:
                        RPM: 1179 /min
                        Load: 33.7 %
                        Speed: 0.0 km/h
                        Temperature: 0.0°C
                        Temperature: 1.0°C
                        Absolute Pres.: 1000.0 mbar
                        Voltage: 14.351 V
    
    000770 - Cylinder 2 
                   P0302 - 001 - Misfire Detected - Intermittent
                 Freeze Frame:
                        Fault Status: 00100001
                        Fault Priority: 2
                        Fault Frequency: 1
                        Reset counter: 255
                        Mileage: 295242 km
                        Time Indication: 0
    
                 Freeze Frame:
                        RPM: 1059 /min
                        Load: 29.8 %
                        Speed: 0.0 km/h
                        Temperature: 0.0°C
                        Temperature: 1.0°C
                        Absolute Pres.: 1000.0 mbar
                        Voltage: 14.351 V
    
    000564 - Boost Pressure Regulation 
                   P0234 - 001 - Limit Exceeded (Overboost Condition) - MIL ON
                 Freeze Frame:
                        Fault Status: 11100001
                        Fault Priority: 2
                        Fault Frequency: 1
                        Reset counter: 255
                        Mileage: 296458 km
                        Time Indication: 0
    
                 Freeze Frame:
                        RPM: 3380 /min
                        Load: 8.2 %
                        Speed: 51.0 km/h
                        Temperature: 90.0°C
                        Temperature: 12.0°C
                        Absolute Pres.: 990.0 mbar
                        Voltage: 13.843 V
    
    Readiness: 0000 0001
    
    -------------------------------------------------------------------------------
    Address 03: ABS Brakes        Labels: 8E0-910-517.clb
       Part No SW: 8E0 910 517 J    HW: 8E0 614 517 BH
       Component: ESP8 quattro    H06 0140  
       Revision: 00000000    Serial number: 00000000000000
       Coding: 0004526
       Shop #: WSC 06335 000 00000
       VCID: 2E050FB69C1833073C1-807A
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 08: Auto HVAC        Labels: 8E0-820-043.lbl
       Part No: 8E0 820 043 BL
       Component:   A4 Klimaautomat   3233  
       Coding: 00000
       Shop #: WSC 00000  
       VCID: 6C81C5BE6F948117525-5184
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 09: Cent. Elect.        Labels: 8E0-907-279-8EC.lbl
       Part No: 8E0 907 279 N
       Component: int. Lastmodul  USA 0907  
       Coding: 00003
       Shop #: WSC 06335  
       VCID: 3D2738FA446ED89FB5B-4B00
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 15: Airbags        Labels: 8E0-959-655-94.lbl
       Part No SW: 8E0 959 655 M    HW: 8E0 959 655 M
       Component:    Airbag 9.41  H01 4240  
       Revision: 91H01424    Serial number: 003CS0001UYM  
       Coding: 0032607
       Shop #: WSC 06335 000 00000
       VCID: 41DF440A3D86BC7FD13-8014
    
       Subsystem 1 - Part No: 8E0 910 339 D
       Component: BF-Gewichtsens. H03 0080
    
       Subsystem 2 - Serial number: 01KN6         
    
       Subsystem 3 - Serial number: 0001.01.0000H0300000000000˙†63
    
       Subsystem 4 - Serial number: 000000˙†6332DRB40613CBB1S˙†63
    
       Subsystem 5 - Serial number: 3CBB1S˙†6342DRB40613479CQ˙†63
    
       Subsystem 6 - Serial number: 3479CQ˙†6352ARB40326763EN˙†63
    
       Subsystem 7 - Serial number: 6763EN˙†6362ARB4032961EDV˙†63
    
       Subsystem 8 - Serial number: 961EDV˙†63729RB402A6C9BE4˙†63
    
       Subsystem 9 - Serial number: 6C9BE4˙†63829RB402A6C9ED7˙
    
       Subsystem 10 - Serial number: 6C9ED7˙
    
    1 Fault Found:
    00532 - Supply Voltage B+ 
                002 - Lower Limit Exceeded - Intermittent
                 Freeze Frame:
                        Fault Status: 00100010
                        Fault Priority: 2
                        Fault Frequency: 40
                        Reset counter: 39
                        Time Indication: 0
    
    
    -------------------------------------------------------------------------------
    Address 16: Steering wheel        Labels: 8E0-953-549.lbl
       Part No: 8E0 953 549 Q
       Component: Lenksáulenmodul     0801  
       Coding: 02041
       Shop #: WSC 06335  
       VCID: 41DF440A3896BC7FD13-4B00
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 17: Instruments        Labels: 8E0-920-9xx-8EC.lbl
       Part No SW: 8E0 920 951 N    HW: 8E0 920 951 N
       Component: KOMBI+WFS 4     H14 0200  
       Revision: 0200        Serial number: 00000000000000
       Coding: 0023001
       Shop #: WSC 03327 444 125814
       VCID: 353720DA795E00DF7DB-5184
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 25: Immobilizer        Labels: 8E0-920-9xx-8EC.lbl
       Part No SW: 8E0 920 951 N    HW: 8E0 920 951 N
       Component: KOMBI+WFS 4     H14 0200  
       Revision: 0200        Serial number: 00000000000000
       Coding: 0023001
       Shop #: WSC 03327 444 125814
       VCID: 353720DA795E00DF7DB-5184
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 46: Central Conv.        Labels:. 8E0-959-433-MAX.clb
       Part No: 8E0 959 433 CP
       Component: Komfortgerát T7B    4336  
       Coding: 11896
       Shop #: WSC 06335  
       VCID: 015F840A78167C7F913-4B00
    
       Subsystem 1 - Part No: 8E1959801G
       Component: Tőrsteuer.FS BRM 0706  
    
       Subsystem 2 - Part No: 8E1959802G
       Component: Tőrsteuer.BF BRM 0706  
    
       Subsystem 3 - Part No: 8E0959801E
       Component: Tőrsteuer.HL BRM 0606  
    
       Subsystem 4 - Part No: 8E0959802E
       Component: Tőrsteuer.HR BRM 0606  
    
    7 Faults Found:
    00962 - Alarm via. Tilt Sensor 
                35-00 -  - 
    01371 - Alarm triggered by Door Contact Switch; Driver's Side 
                35-00 -  - 
    00913 - Window Regulator Switch; Front Right Driver (E81) 
                27-10 - Implausible Signal - Intermittent
    00915 - Window Regulator Switch; Rear Right; Driver (E55) 
                27-10 - Implausible Signal - Intermittent
    00912 - Window Regulator Switch; Front Left (E40) 
                27-10 - Implausible Signal - Intermittent
    00934 - Electric Window Motor; Rear Left (V26) 
                62-10 - No or Incorrect Adjustment - Intermittent
    00935 - Electric Window Motor; Rear Right (V27) 
                62-10 - No or Incorrect Adjustment - Intermittent
    
    -------------------------------------------------------------------------------
    Address 56: Radio        Labels: 8J0-035-1xx-56.clb
       Part No SW: 8E0 035 195 AF    HW: 8E0 035 195 AF
       Component: R Symphony2+    H01 0270  
       Revision: 00H01000    Serial number: AUZ1Z4G6903916
       Coding: 0230012
       Shop #: WSC 06335 000 00000
       VCID: 6B83C6A26FAA862F5BF-5160
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 65: Tire Pressure        Labels: 8E0-907-273.lbl
       Part No SW: 8E0 907 273 A    HW: 8E0 907 273 A
       Component: Reifendruck 3   H04 0130  
       Coding: 0042121
       Shop #: WSC 06435 000 00000
       VCID: 2A0D03A6A0D05F27E09-5160
    
    1 Fault Found:
    00532 - Supply Voltage B+ 
                002 - Lower Limit Exceeded - MIL ON
                 Freeze Frame:
                        Fault Status: 11100010
                        Fault Priority: 3
                        Fault Frequency: 67
                        Reset counter: 40
                        Time Indication: 0
    
                 Freeze Frame:
                        (no units): 0.0
                        Voltage: 0.40 V
                        (no units): 42.0
                            Not Recogn.
                            Not Recogn.
                            Not Recogn.
                            Not Recogn.
                        Angle: 0.000°
    
    
    End----(Elapsed Time: 05:33, VBatt start/end: 11.8V/11.8V. VIgn 11.8V)-----
    Last edited by Uwe; 04-20-2019 at 11:48 AM. Reason: CODE tags

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