amsnooze

my audi 2006 a8L few weeks ago was having starting issues, with the help of AudiWorld team and VAG findings i was able to get that issue resolved by replacing crank sensor. During the troubleshooting i had removed MAF and cleaned it using CRC MAF cleaner, left it out overnight to dry and installed it next AM but now i am getting 'System too Rich' codes. I ran the VAG MAF test and results are in the pic below. Is it pretty conclusive at this point based on VAG MAF result that the issue is related to MAF and it needs to be replaced? Did i damage the MAF sensor by taking it out and cleaning it using CRC MAF Cleaner?

Address 01: Engine Labels: None
Part No SW: 4E0 910 560 P HW: 4E0 907 560
Component: 4.2L V8/5V G 0010
Revision: --H01--- Serial number: AUX3Z0E6769891
Coding: 0007773
Shop #: WSC 02313 785 00200
VCID: 2E53E833B9E29E6E36F-807B

2 Faults Found:
17537 - Fuel Trim; Bank 2 (Mult)
P1129 - 002 - System too Rich
Freeze Frame:
Fault Status: 01100010
Fault Priority: 0
Fault Frequency: 5
Reset counter: 255
Mileage: 270927 km
Time Indication: 0

Freeze Frame:
RPM: 2116 /min
Load: 22.0 %
Speed: 117.0 km/h
Temperature: 86.0°C
Temperature: 33.0°C
Absolute Pres.: 0.0 mbar
Voltage: 13.589 V

17535 - Fuel Trim; Bank 1 (Mult)
P1127 - 002 - System too Rich - Intermittent
Freeze Frame:
Fault Status: 00100010
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 270927 km
Time Indication: 0

Freeze Frame:
RPM: 2044 /min
Load: 18.4 %
Speed: 116.0 km/h
Temperature: 86.0°C
Temperature: 33.0°C
Absolute Pres.: 0.0 mbar
Voltage: 13.589 V

Readiness: 0000 0100

amsnooze

so, bought a new MAF off Amazon 'free next day delivery, couldn't resist' and after installing it car cranks/starts fine but acts like its losing power right after it. I disconnected the new MAF and it starts and runs fine. Did i get a defective MAF ? sad face

ltooz_a6_a8_q7

No, it's only works with original one. I got the same problem. Bought Hitachi and it worked perfectly

amsnooze

Original one is made by Hitachi, hun..the one i got is Bosch Original Equipment 0280218069

.did you buy yours from a local dealership or a website? if website can you please let me know which one?

ltooz_a6_a8_q7

I've never replaced the one on the D3, but the last one I replaced on the V6 was Hitachi, and the one on the D2 4.2 was actually the Bosch... Sorry, my mistake. I got them from Autohauz. The aftermarket on really loss power when installed until the original one was in place.
A8 D2

MP4.2+6.0

Without scanning I couldn’t be sure, but common sense says you either got a defective one, or not the right one specifically for D3 4.2.

amsnooze

so, turned out to be loose air inlet tube attached to the throttle body. i tightened it down and no codes came back & this fixed my cold start engine shake issue as well. it is tightened down using bolt hose clamp. I have no clue how it got loosen but i would advise checking it if you are experiencing issues similar to what i have described. I appreciate everyone's input helping me sorting this out.