MAF sensor codes G70/P0102

   #1  

speede777

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Two weeks ago removed MAF sensor to clean it. MPG was about 2 mpg low and I hadn't performed this maintenance in a while. The next day after an engine restart I received the following codes, G70, P0102. Removed and replaced the MAF with a BREMI MAF for this vehicle. Cleared the code. Took a 15 to 20 mile ride with no codes. Stopped and turned off the engine. As soon as I restarted the engine , "check engine" light was back on. Same codes:
Mass Air Flow Sensor (G70)
P0102 - 000 - Signal too Low

Not seeing any vacuum or intake hose leaks. Fuel mileage increased 3 to 4 miles per gallon. Air filter has about 25K miles on it.

Code:
Saturday,22,January,2022,13:03:29:32859
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 21.9.0.2 (x64)
Data version: 20210903 DS330.0
www.Ross-Tech.com


VIN: 3VWST71KX6M628479   License Plate:
Mileage: 281320km-174804mi   Repair Order: 2006_Jetta_TDI_01.22.22


Chassis Type: 1K (1K0)
Scan: 01 02 03 08 09 0F 15 16 17 19 25 42 44 46 52 56 62 72 7D

VIN: 3VWST71KX6M628479   Mileage: 281320km-174804miles

00-Steering Angle Sensor -- Status: OK 0000
01-Engine -- Status: Malfunction 0010
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
0F-Digital Radio -- Status: Malfunction 0010
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
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
56-Radio -- Status: OK 0000
62-Door, Rear Left -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
7D-Aux. Heat -- Status: OK 0000

-------------------------------------------------------------------------------
Address 01: Engine        Labels: 038-906-016-BEW.lbl
  Part No SW: 03G 906 016 AC    HW: 028 101 223 9
  Component: R4 1,9L EDC G000DG  7551 
  Revision: --H01---    Serial number: VWZ7Z0E2329603
  Coding: 0050078
  Shop #: WSC 00066 000 00000
  VCID: 64C7FA0BA7DBE4A9C5-8030
  VINID: 0E69E390705BA0674608810724D14B86E8

1 Fault Found:
000258 - Mass Air Flow Sensor (G70)
              P0102 - 000 - Signal too Low
            Freeze Frame:
                   Fault Status: 01110000
                   Fault Priority: 0
                   Fault Frequency: 1
                   Reset counter: 255
                   Mileage: 281230 km
                   Time Indication: 0

            Freeze Frame:
                   RPM: 1008 /min
                   Speed: 0.0 km/h
                   Load: 0.0 %
                   Duty Cycle: 100.6 %
                   Bin. Bits: 00101000
                   Mass Air / Rev.: 530.0 mg/str
                   Mass Air / Rev.: 0.0 mg/str

Readiness: 1 1 0 0 1

-------------------------------------------------------------------------------
Address 02: Auto Trans        Labels: 02E-927-770.clb
  Part No SW: 02E 300 042 H    HW: 02E 927 770 AD
  Component: GSG DSG         070 0913 
  Revision: 04007000    Serial number: 00000505060581
  Coding: 0000020
  Shop #: WSC 00066 000 00000
  VCID: 183F9EFB2B13F04999-804C

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels: 1K0-907-379-MK60-F.lbl
  Part No SW: 1K0 907 379 Q    HW: 1K0 907 379 Q
  Component: ESP FRONT MK60      0102 
  Revision: 00T12001   
  Coding: 0021122
  Shop #: WSC 00066 000 00000
  VCID: 408F169B1303988901-8014

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: 1K0-820-047.lbl
  Part No: 1K0 820 047 DL
  Component: Climatic PQ35   090 0505 
  Shop #: WSC 00000 000 00000
  VCID: 71E9835F68294101BE-8024

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect.        Labels:. 3C0-937-049-23-M.lbl
  Part No SW: 3C0 937 049 D    HW: 3C0 937 049 D
  Component: Bordnetz-SG     H37 1002 
  Revision: 00H37000    Serial number: 00000000105351
  Coding: 14018E234004180000140000001400000008730B5C
  Shop #: WSC 08287 444 58823
  VCID: 2A5B5433857F72D93F-807E

  Subsystem 1 - Part No: 1K1 955 119 B  Labels: 1KX-955-119.CLB
  Component: Wischer VW350  012  0401 
  Coding: 00065493
  Shop #: WSC 08287 

No fault code found.

-------------------------------------------------------------------------------
Address 0F: Digital Radio        Labels: 8E0-035-593-SIR.lbl
  Part No SW: 8E0 035 593 D    HW: 8E0 035 593 D
  Component: SDAR SIRIUS     H03 0060 
  Revision: 00000000    Serial number: AUZ4Z7E4009224
  Shop #: WSC 00000 000 00000
  VCID: 2A5B5433857F72D93F-807E

1 Fault Found:
02635 - Tuner Not Enabled/Activated
           000 - -
            Freeze Frame:
                   Fault Status: 01100000
                   Fault Priority: 7
                   Fault Frequency: 1
                   Reset counter: 54
                   Mileage: 281230 km
                   Time Indication: 0
                   Date: 2000.00.00
                   Time: 00:58:08


-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 1K0-909-605.lbl
  Part No SW: 1K0 909 605 E    HW: 1K0 909 605 E
  Component: 1S AIRBAG VW8R  024 6300 
  Revision: 03024000    Serial number: 0037KD02GVW  
  Coding: 0012627
  Shop #: WSC 00066 000 00000
  VCID: 2E535823B9971EF9E3-807A

  Subsystem 1 - Part No: 1K0 959 339 B
  Component: BF-Gewichtsens. 006 0003

  Subsystem 2 - Serial number: 6332MSME0A0D38038

  Subsystem 3 - Serial number: 6342MSME0A0C4D3ES

  Subsystem 4 - Serial number: 6351HSME07230F745

  Subsystem 5 - Serial number: 6361HSME0707054B2

  Subsystem 6 - Serial number: 63727SME07104A70W

  Subsystem 7 - Serial number: 63827SME070F4F7CL

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel        Labels: 1K0-953-549-MY8.lbl
  Part No SW: 1K0 953 549 AH    HW: 1K0 953 549 AH
  Component: J0527           034 0070 
  Coding: 0010021
  Shop #: WSC 00066 000 00000
  VCID: 78FFBE7B0B53104979-802C

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 1K0-920-xxx-17.lbl
  Part No: 1K0 920 952 D
  Component: KOMBIINSTRUMENT 3HL 1012 
  Coding: 0023203
  Shop #: WSC 00066 000 00000
  VCID: 2B5551378A856BD1C4-807E

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway        Labels:. 1K0-907-530-V1.clb
  Part No SW: 1K0 907 530 F    HW: 1K0 907 951
  Component: Gateway         H10 0120 
  Revision:   H10       Serial number: 280010542184C5
  Coding: 3F3F0B60071002
  Shop #: WSC 00066 000 00000
  VCID: 2A5B5433857F72D93F-807E

No fault code found.

-------------------------------------------------------------------------------
Address 25: Immobilizer        Labels: 1K0-920-xxx-25.clb
  Part No: 1K0 920 952 D
  Component: IMMO            3HL 1012 
  Shop #: WSC 00000 000 00000
  VCID: 2B5551378A856BD1C4-807E

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver        Labels: 1K0-959-701-MIN2.lbl
  Part No: 1K0 959 701 K
  Component: Tuer-SG         024 2339 
  Coding: 0001269
  Shop #: WSC 00066 000 00000
  VCID: 3663704341C72639AB-8062

1 Fault Found:
00109 - Left Mirror Turn Signal Lamp (L131)
           012 - Electrical Fault in Circuit - Intermittent

-------------------------------------------------------------------------------
Address 44: Steering Assist        Labels: 1Kx-909-144-G2V2.clb
  Part No: 1K1 909 144 J
  Component: EPS_ZFLS Kl.5   D04 1606 
  Shop #: WSC 00000 000 00000
  VCID: 326B4C53ADAF3A1987-8066

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv.        Labels:. 1K0-959-433-MIN.clb
  Part No: 1K0 959 433 AF
  Component:    KSG              0401 
  Coding: 137803281B09058F880F048051A0
  Shop #: WSC 00066 000 00000
  VCID: 74E78A4B173B742955-8020

  Subsystem 1 - Component:   Sounder n.mounted    

  Subsystem 2 - Component:       NGS n.mounted    

  Subsystem 3 - Component:      IRUE n.mounted    

No fault code found.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass.        Labels: 1K0-959-702-MIN2.lbl
  Part No: 1K0 959 702 K
  Component: Tuer-SG         024 2339 
  Coding: 0001269
  Shop #: WSC 00066 000 00000
  VCID: 377D7D4746CDDF31B0-8062

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio        Labels: 1K0-035-1xx-56.clb
  Part No SW: 1K0 035 180 C    HW: 1K0 035 180 C
  Component: Radio ZSW       016 0017 
  Revision: 00016000    Serial number: VWZ5Z7E6005506
  Coding: 0040400
  Shop #: WSC 00066 000 00000
  VCID: 204FB61BF343B88961-8074

No fault code found.

-------------------------------------------------------------------------------
Address 62: Door, Rear Left        Labels: 1K0-959-703-GEN2.lbl
  Part No: 1K0 959 703 D
  Component: Tuer-SG         021 2416 
  Coding: 0000144
  Shop #: WSC 00066 000 00000
  VCID: 3169435FA8A90101FE-8064

No fault code found.

-------------------------------------------------------------------------------
Address 72: Door, Rear Right        Labels: 1K0-959-704-GEN2.lbl
  Part No: 1K0 959 704 D
  Component: Tuer-SG         021 2416 
  Coding: 0000144
  Shop #: WSC 00066 000 00000
  VCID: 326B4C53ADAF3A1987-8066

No fault code found.

-------------------------------------------------------------------------------
Address 7D: Aux. Heat        Labels: 1K0-963-235.lbl
  Part No SW: 1K0 963 235 E    HW: 1K0 963 235 E
  Component: PTC-Element         0404 
  Revision: 00800000    Serial number:              
  Shop #: WSC 00000 000 00000
  VCID: 2D515F2FB49165E1DA-8078

No fault code found.
 
   #2  

Uwe

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Check harness connector at MAF sensor. Female pins might be getting weak/loose.

If that all checks out, I think you should consider buying a MAF sensor at the dealer instead of aftermarket.

-Uwe-
 
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   #3  

speede777

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Harness jacket and wires is on order from VW dealer. Waiting for delivery. Not a complete pig tail assembly. Has to be built 1 wire at a time.
 
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   #4  

JMR

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have you tried to twist the pins inside MAF plug a bit ?
 
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speede777

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have you tried to twist the pins inside MAF plug a bit ?
I do not have the replacement parts. If the pin breaks I do not have any transportation.
 
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speede777

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Check harness connector at MAF sensor. Female pins might be getting weak/loose.

If that all checks out, I think you should consider buying a MAF sensor at the dealer instead of aftermarket.

-Uwe-
Bremi is an OE supplier for BMW, MB and Audi. Their parts are made in Germany.
 
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Uwe

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Bremi is an OE supplier for BMW, MB and Audi. Their parts are made in Germany.
Yep. But there are a lot of fake OEM parts floating around and the manufacturers in a certain country in Asia are utterly shameless about trademark and country-of-origin markings.

But even assuming it's a legit Bremi part, is it really the correct part?

I'm not saying any of this is the source of the problem, but we've seen lots of problems caused by things like this.

-Uwe-
 
   #8  

dieseldub

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Given that Bosch is the actual OE maker of these sensors, I would trust Bosch more than Bremi specifically on TDIs where concerning these sensors.

Still, looking at your freeze frame, it appears that when it set the code, the MAF sensor was effectively reporting 0, which screams to me a bad connection or a wire further back in the harness barely hanging on by a thread. Rare for a MAF sensor to fail in a way that it reports 0, even an aftermarket Bremi unit...
 
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JMR

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You dont have to twist the crap out of it..just a slight twist where it could make a better connection..don t worry , those pins are not as fragile as you think.
 
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   #10  

EuroX

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Last time I checked Bosch makes a majority of sensors for VAG. Also seen alot of a fakes that are worth the crummy box they come in let alone the cheap price. You know how many people buy fake bosch 044 fuel pumps and have issues with fueling on performance cars?? A shit load. Lots of fakes out there.
 
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