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Thread: 16486 - Mass Air Flow Sensor (G70)

  1. #1
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    16486 - Mass Air Flow Sensor (G70)

    RE : Address #1
    I'm looking for suggestions on my best approach to this issue.
    Firstly I have removed/ unscrewed the sensor and cleaned it as good as I could . Is there anything that I can do using the hex net to determine whether the sensor is the issue before replacing parts. Also Im reading that there are quite a few sensors that will fit but not necessarily be correct. I looked at the identifiers on the sensor but I cant be sure that its the correct one since the manufacturing date was in 2005 even though the car is a vw cabrio 2002.
    Thanks for your time

    EDIT . I did this but not sure if i followed the procedure correctly. I'm looking for the log from the procedure but I cant find it anywhere. Maybe I didn't do it right. Finally what is 3e gear , is that 3rd gear?
    " You can check functionality by making a log in [01-engine], [meas.blocks-08], group 003 (3e gear, full throttle, from 1700-4000rpm)"

    Code:
    Friday,02,September,2016,11:12:47:42100
    VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
    VCDS Version: 16.8.0.3 (x64)  HEX-NET CB: 0.4321.4
    Data version: 20160803 DS255
    www.Ross-Tech.com
    
    
    VIN: XXXXXXXXXXXXXXXXX   License Plate: 
    
    
    Chassis Type: XX (1V - VW Golf Cabriolet (1997 > 2002))
    Scan: 01 02 03 08 15 25 35 56
     
    VIN: XXXXXXXXXXXXXXXXX   
    -------------------------------------------------------------------------------
    Address 01: Engine        Labels: 037-906-018-ABA.lbl
       Part No: 037 906 018 H
       Component: 2.0l R4/2V  MOTR AT V04  
       Coding: 00003
       Shop #: WSC 00066  
       VCID: 9A78996F043B4D92CE-4B3C
    
    1 Fault Found:
    16486 - Mass Air Flow Sensor (G70) 
                P0102 - 35-00 - Signal too Low
    Readiness: 0010 1101
    
    -------------------------------------------------------------------------------
    Address 02: Auto Trans        Labels: 01M-927-733.lbl
       Part No: 01M 927 733 LA
       Component: AG4 Getriebe 01M    4899  
       Coding: 00000
       Shop #: WSC 00000  
       VCID: FAB8B9EFE47BAD926E-0964
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 03: ABS Brakes        Labels: 3A0-907-379.lbl
       Part No: 3A0 907 379 D
       Component: ABS     ITTAE 20 GI V00  
       Coding: 03704
       Shop #: WSC 00000  
       VCID: AB164CAB5BA1C41AA5-4AC2
    
    3 Faults Found:
    01276 - ABS Hydraulic Pump (V64) 
                16-00 - Signal Outside Specifications
    00287 - ABS Wheel Speed Sensor; Rear Right (G44) 
                35-10 -  -  - Intermittent
    00287 - ABS Wheel Speed Sensor; Rear Right (G44) 
                16-10 - Signal Outside Specifications - Intermittent
    
    -------------------------------------------------------------------------------
    Address 25: Immobilizer        Labels: 6X0-953-257.lbl
       Part No: 6X0 953 257 
       Component: IMMO                0008  
       Coding: 00001
       Shop #: WSC 40629  
       VCID: FDB2B2F3F5559AAA4B-4B3C
       XXXXXXXXXXXXXXXXX     VWZ1Z0A1666169
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 56: Radio        Labels: 1J0-035-18x-56.lbl
       Part No: 1JM 035 157 A
       Component:  Radio DE2         0005  
       Coding: 07403
       Shop #: WSC 09144  
       VCID: BE3075FFB8D341B212-51F2
    
    1 Fault Found:
    00856 - Radio Antenna 
                36-00 - Open Circuit
    
    End----------(Elapsed Time: 02:13, VBatt start/end: 12.3V/12.1V)-----------
    Last edited by Uwe; 09-02-2016 at 01:18 PM. Reason: CODE tags

  2. #2
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    Please check the MAF data and the EGR at the same time, if the EGR is stuck open, on older cars, you get a MAF error, wilst the EGR is the cause

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    Benevolent Dictator Uwe's Avatar
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    I would indeed take a look at what the ECU is seeing in [01-Engine] [MVB 003.2]. Start with just checking it at idle. I would expect to see 2-4 g/s at idle. If that's OK, then log it throughout the RPM range at full throttle in the highest gear you can. If you're in the city, that may be 2nd rather than 3rd gear.

    -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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    NostraJackAss Jack@European_Parts's Avatar
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    What MAF part # is installed?

    Please post pictures ..........

    Part No: 037 906 018 H
    Component: 2.0l R4/2V MOTR AT V04
    Coding: 00003
    Based on the part # above for engine controller, you have the later production, and require MAF part # 06A-906-461C or CX

    Another example how an auto-scan helps us help you............
    Last edited by Jack@European_Parts; 09-02-2016 at 01:53 PM.
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    Professional User Jetta ,97's Avatar
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    This is common problem on ABA engines.The problem is that breather hose is design very bad , above air boot and what happens , oil from breather hose goes down to air flow meter.

    Is you car idling up/down?
    When you Remove air boot did you see lot of oil at air flow meter?

    In most cases cleaning whole air boot and air flow meter will fix problem.
    I suggest to use Air Flow mater cleaner form retail store like Napa , o'reilly and Etc, if you use Carb cleaner, or similar stuff you will kill sensor.

    I know JACK will not agree with me on this one for cleaning with Air flow meter cleaner, .
    Master Technician for German cars
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    Quote Originally Posted by Jetta ,97 View Post
    This is common problem on ABA engines.The problem is that breather hose is design very bad , above air boot and what happens , oil from breather hose goes down to air flow meter.

    Is you car idling up/down?
    When you Remove air boot did you see lot of oil at air flow meter?

    In most cases cleaning whole air boot and air flow meter will fix problem.
    I suggest to use Air Flow mater cleaner form retail store like Napa , o'reilly and Etc, if you use Carb cleaner, or similar stuff you will kill sensor.

    I know JACK will not agree with me on this one for cleaning with Air flow meter cleaner, .
    Thanks for the response. The air boot was cleaned and every other part of that system prior to this problem.

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    Quote Originally Posted by Jack@European_Parts View Post
    What MAF part # is installed?

    Please post pictures ..........



    Based on the part # above for engine controller, you have the later production, and require MAF part # 06A-906-461C or CX

    Another example how an auto-scan helps us help you............
    Hi Jack, i cant find the paper clip symbol to attach pictures .The manufacturing date for the part (just the sensor ,not the box unit) was july of 2005 even though its a 2002 car. So who knows if this is actually the correct sensor. The numbers on the MAF sensor are BOSCH F00C-262034 Also 587-21-3c ( another marking on there) and an encircled 3 digit number 816.
    VIN 3VWDC21VX2M803667
    This car does not have an EGR but rather a Secondary air control valve.
    PS How am I to attach a picture?

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    Thanks Dutchie, will do , just so you know this model is a 2002 non californian car . The Californians have an EGR and from what I understand , the rest have a secondary air control valve /pump system.Group number 077

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    Thanks Uwe. I just completed doing that. However I'm not sure if I followed your instruction to a T . "then log it throughout the RPM range" I started at idle , hit the log button (not the add to log ,,not sure sure what the difference or purpose is yet of that) Took it out on Stenton Ave to 309 , came back and hit STOP.
    Then attached the data to a LOG SUBMISSION FORM and sent it in.
    So did i do that much correctly. ? Did I leave anything out?
    BTW could you tell me how to attach a csv or and jpeg to this forum , I cant find the paper clip symbol. Thanks again

  14. #10
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    There is a trick for some MAF to check them if they are good. It must be from Bosch, and it has to be a 5 pin (4 pin works to some times :P ). Leave the connector on the MAF, decouple the MAF from the hoses and duct tape both side shut, so there is no movement of the air. Then use a digital volt meterv or a scoop, and check the voltage from the MAF, it has to be 1V (+/- 0.01V), any thing else, then its not trust worthy and needs to be replaced.

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