Here is what we found:

Chassis Type: 4A - Audi 100/A6 C4
>Scan: 01,02,03,08,15,17,25
>
>-------------------------------------------------------------------------------
>Address 01: Engine
> Controller: 8A0 906 266 BV
> Component: 6 2,8 2V MPI V6AC39 D0E
> Coding: 00005
> Shop #: WSC 02315
>2 Faults Found:
>00554 - Lambda (Oxygen Sensor) Regulation 2
> 09-10 - Adaptation Limit Surpassed - Intermittent
>00537 - Lambda (Oxygen Sensor) Regulation
> 09-10 - Adaptation Limit Surpassed - Intermittent
>Readiness: N/A


Here is what the Bentley has:

00554
2331
X




Oxygen Sensor Control II

Auxiliary fuse 28 faulty
Fuel tank empty (10 liter minimum)
Fuel system pressure too low
Fuel system pressure too high
Malfunction of spark plugs, spark plug connectors, ignition wires
Intake air leak downstream of MAF sensor -G70-
CO before three way catalyst is less than 3%
Increased fuel consumption
Black smoke
Spark plug fouling
CO before three way catalyst is greater than 1%
- Fill fuel tank
- In basic setting, read display group 009, display field 2 Page 01-85

Control limit exceeded 1)

Control limit not reached 1)

Leak in exhaust system before Three Way Catalyst (TWC)
- Repair leak

Oxygen Sensor (O2S) faulty
EVAP canister purge regulator valve -N80- sticks
- Check O2S control
- Check EVAP canister purge regulator valve -N80- Page 24-44


1) One of these malfunction types is displayed in addition to the component.

O2S control for cylinders 4, 5, and 6

The "Control limit exceeded" malfunction is set as soon as probe voltage is less than 300 mV for longer than 2 minutes with an engine coolant temperature over 80C (176F) in the control range

The "Control limit not reached" malfunction is set as soon as the probe voltage is greater than 600 mV for longer than 2 minutes with an engine coolant temperature over 80C (176F) in the control range.

So my question is, was the control limit exceeded or not reached? I am not sure how to apply the information from the scan to the information in the Bentley. Where do I begin to look for the issue? TIA.

VW/Audi/Bentley are often not consistent when it comes to that kind of terminology.

Anyway, I think we can safely say that "Surpassed" means the same as "Exceeded".

-Uwe-

control limit surpassed along with the code, it narrows it down to O2 sensor faulty or leak in exhaust system? Or is it the whole list of possible problems that Bentley gives plus the O2 sensors and exhaust leak before the cats?