05 E60 P0491 Secondary Air Injection System Fault
I too have this issue for about 2 weeks. Reset the code twice using my new Android Torgue app (Droid Razr) in conjunction w/new Bluetooth OBDII (Excel) diagnostic plug device. Code came back again...now after some research I have to dive in and do a complete systematic air flow check. This links may help:
I will check back in w/ my findings!
Thanks to everyone for the posts in this forum, I have learned a lot and saved thousands!
Last edited by svett; 02-07-2013 at 08:28 AM.
Reason: wrong info