New to Ross-Tech - MAF error code?

   #1  

Staffanski

Verified VCDS User
Verified
Joined
Aug 6, 2020
Messages
3
Reaction score
2
Location
Australia
VCDS Serial number
C?ID=410955
Hi and greetings from Sydney Australia.
Just got a new HEX V2 so I want to introduce myself and 'Claudia', my 2001 Audi A4 (B5 8D) 1.8T / APU Engine. For several weeks, she's been running poorly, and stuttering both on acceleration and cruising. My first thought was a vacuum leak and I did find a cracked check valve, and the diverter valve was kaput, but this didn't help. A local workshop (also using VCDS) found an O2 sensor alarm - a new sensor cleared the fault but not the performance issue. At this point I got my own VCDS and started playing. Groups 002 and 032/033 are pointing me toward a bad MAF...002 readings are in spec at idle, but low gr/s when driving (fluctuating between 5 - 14 at around 2000rpm, and 17 - 24 around 4000rpm); Group 032 fuel trim is indicating +2.8% (add) & +14 to +25% (mult). I gave the MAF a thorough spray with CRC MAF cleaner, but still no better. To seal the deal, I disconnected the MAF, and the stationary throttle/rpm response in Neutral was now linear (no stuttering around 2000rpm) but stuttered again with the MAF back in play. So I've ordered a new MAF, and fingers crossed, it'll sort my issues.
What puzzles me though, is that my Auto Scan didn't show any error codes to this effect. Is this normal? To be fair, I'm new to this code scanning (more of your ol' school socket and wrench mechanical fault finder) so I may not have set up the scan correctly. Any suggestions greatly appreciated. Anyway, really excited about playing with my new Ross-Tech tool, and learning more about the car. Below is my Auto Scan.
Cheers, Stephen.

Code:
Friday,07,August,2020,10:11:25:08150
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 20.4.2.0 (x64)  HEX-V2 CB: 0.4513.4
Data version: 20200730 DS317.0
www.Ross-Tech.com


Mileage: 316580km-196713mi   Repair Order: 



--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Chassis Type: XX (8D - Audi A4/S4/RS4 B5 (1995 > 2002))
Scan: 01 02 03 08 15 16 17 25 35 37 45 55 56 57 67 75 76 77
 
VIN: XXXXXXXXXXXXXXXXX   Mileage: 316580km-196713miles
-------------------------------------------------------------------------------
Address 01: Engine        Labels: Redir Fail!
   Part No: 4B0 906 018 AR
   Component: 1.8L R4/5VT     G   0006  
   Coding: 05051
   Shop #: WSC 20690  
   VCID: 71BFD1C6D8B8E7E3ADD-513C

No fault code found.
Readiness: 0000 0000

-------------------------------------------------------------------------------
Address 02: Auto Trans        Labels: 01V-927-156.lbl
   Part No: 8D0 927 156 AL
   Component: AG5 01V 1.8l5VT RdW 2526  
   Coding: 00003
   Shop #: WSC 63351  
   VCID: 77ABEFDEB6DCB9D3639-513C

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels: 8E0-614-111-ABS.lbl
   Part No: 8E0 614 111 AB
   Component: ABS 5.3 FRONT       D00  
   Shop #: BB 24548  
   VCID: 5EE59A7A3926689B00F-51CE

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: 8D0-820-043-1D.lbl
   Part No: 8D0 820 043 M
   Component: A4     KLIMAAUTOMAT D58  
   Coding: 00041
   Shop #: WSC 63351  
   VCID: 2A0D06AA35EED43B2C7-259E

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 8D0-959-655-AI8.lbl
   Part No: 8D0 959 655 J
   Component: Airbag Front+Seite 2001  
   Coding: 00104
   Shop #: WSC 21540  
   VCID: 3D273DF6D4605383795-513C

1 Fault Found:
00588 - Airbag Igniter; Driver Side (N95) 
            42-10 - Speed Deviation too High - Intermittent

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 8D0-920-xxx-17.lbl
   Part No: 8D0 920 901 C
   Component: KOMBI+WEGFAHRS. M73 D53  
   Coding: 00742
   Shop #: WSC 20690  
   VCID: 2411E89257CA024B16B-4B00
   XXXXXXXXXXXXXXXXX     AUZ5Z0A5085060

2 Faults Found:
00771 - Fuel Level Sensor (G) 
            29-10 - Short to Ground - Intermittent
00779 - Outside Air Temp Sensor (G17) 
            30-00 - Open or Short to Plus

-------------------------------------------------------------------------------
Address 35: Centr. Locks        Labels:. 8D0-862-257.clb
   Part No: 8D0 862 257 B
   Component: ZV-Pumpe, Funk      D16  
   Coding: 14912
   Shop #: WSC 20690  
   VCID: 2C0100B23F1ACA0BDEB-4EEA

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio        Labels: 8D0-035-1xx-56.lbl
   Part No: 4B0 035 186 E
   Component:  Radio             0001  
   Coding: 00203
   Shop #: WSC 63351  
   VCID: 221DEE8A4DDE0C7B647-4AE0

No fault code found.

End----------(Elapsed Time: 03:40, VBatt start/end: 12.0V/12.3V)-----------
 
   #2  

Uwe

Benevolent Dictator
Staff member
Joined
Jan 29, 2014
Messages
30,048
Reaction score
21,452
Location
USA
VCDS Serial number
HC100001
   #3  

Staffanski

Verified VCDS User
Verified
Joined
Aug 6, 2020
Messages
3
Reaction score
2
Location
Australia
VCDS Serial number
C?ID=410955
Thanks Uwe. That's a great Fuel Trim write up.
Sorry, I should have been more specific. Those low Group 32 readings I got was using the 'foot to the floor' method, but unfortunately I could only get up to 3960 rpm at best, trying both 2nd and 3rd gears. Hopefully, my new MAF should arrive this week and then I'll put it all back together to get running, and know one way or the other if that was the problem. Anyway, the car has over 300,000 km on her and, to my knowledge, hadn't had the MAF replaced, so definitely got it's moneys worth.
I like the idea of the Group 115 checks, so I'll be sure to check that out as well. Thanks for your advice.
Cheers, Stephen
 
   #4  

Staffanski

Verified VCDS User
Verified
Joined
Aug 6, 2020
Messages
3
Reaction score
2
Location
Australia
VCDS Serial number
C?ID=410955
Hi, just a quick follow up. Put the new MAF sensor in and it fixed the issue straight away. She's running like a new car now!:D
So, it wasn't showing any MAF specific fault codes, but thanks to the Ross-Tech tool I was able to narrow it down to the MAF being the likely culprit. Thanks to all at Ross-Tech for developing such a great diagnostic tool, and I can only wonder why why why I didn't get one sooner!
Cheers,
Stephen
 
Top