[s-cars] Audi Service History Codes: what does it all mean?

[Rob Pecsar]

Question for the list:

I was given the Service History for my S4, which is a Audi dealer
print-out of all "Operations" done to the car since '96. Does anybody
have the translations of the four digit service codes, or where to get
the table of codes

O2 sensor question:

I have been chasing down the source of my ping w/ my new MTM changes.
Chg'd plugs and fuel filter - nodifference. Did Basic Engine Test last
night with VAG-COM, and all 10 values were in range except Number 9 (O2S
adaption). Value was ~85 and s/b 100 - 125.  The comment in the Bentley
manual is "Conduct road test". Does that mean check the value during a
road test?

Anyway, I followed the diagnostics for the O2 sensor, and Lambda value
does flutuate around 1.00 while the car is idling. But it changes about
0.01 or 0.02 every 2 seconds or so. Are you guys seeing your adjust
faster? Wondering if its time to swap the O2 sensor. When I rev the
motor, I see the full Lambda range fluctuation, just unsure how fast it
should react at an idle. O2 sensor is a Pricey(not ricey) bugger: $127 @
thepartsbin.com.

TIA,

Rob Pecsar
92 S4