on September 29, 2011, 1:22 pm, in reply to "Audi RS4 Secondaryair system fault"
I can see that you have looked at the pipes, but what other tests have you done?
Have you tried the run the system from the scan tool, have you checked the control circuit, are the fuses OK, are there any other fault codes present, etc.
Regards Mark
Modern cars, Its all wizardry and witchcraft
Message Thread 
Audi RS4 4.2 2006 - P0491 Secondary air system fault bank 1 # - Tom Poulton September 29, 2011, 11:27 am
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