OBDMID 58 ($3A): Fuel Tank EVAP System Leak Test (0.090)

WARNING: This page is about a different car, the 2009 Audi S8, 2008 Audi S8, and 2007 Audi S8. However, it is still accessible from the selected car via links, so may be relevant.

Connect the scan tool.
Start the engine and let run at idle speed.
Select "Mode 6: Check test the results of components that are not continuously monitored".

Select "OBDMID 59 ($3B)".

Select the desired "Test-ID".
Check specified values at idle.

Test-ID (TID) (Hex-ID)	DTC	Component or System	Min.	Max.	Additional Information
129 ($81)	P0455	Fuel Tank Leak Test. Large leak.	0.95 - 1.1 Seconds	---	Refer to DTC P0455 in the DTC table.

If any component or system fails to meet the specified values, refer to Diagnostic "Mode 03: Interrogating Fault Memory" to check for stored DTCs or the corresponding diagnostic repair procedure.
Switch the ignition off.
End of diagnosis.