[Biturbos4] Engine DTC help request

[Ti Kan]

Hi all,

I ran a fault scan with VAG-COM on my 2001.5 S4 yesterday and
the ECU reported the following:

---------
Control Module Part Number: 8D0 907 551 M  
  Component and/or Version: 2.7l V6/5VT     G   0001
           Software Coding: 06711
            Work Shop Code: WSC 06435
1 Fault Found:
17538 - Fuel Trim: Bank 2 (Mult): System too Lean
        P1130 - 35-10 - - - Intermittent
---------

Searching the VAG-COM mailing list and Audiworld forums on this DTC
gave a few references to MAF going bad.  But most of those referred to
the earlier, trouble-prone Bosch MAFs rather than the Hitachi MAF that
my car has.  At any rate, the DTC says it's intermittent, so I cleared
the code and went for a test drive, accelerating the car up to 6000 rpm
a couple of times.  Re-checking with VAG-COM, and the DTC did not return.

So, all seems ok at this point, but I wonder if the DTC might be a sign
that the diverter valves are wearing out?  Mine are the original ones
that came with the car.

Any BTDTs would be appreciated.

-Ti