SAIP Issue--4.2
02-19-2010, 07:29 AM
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SAIP Issue--4.2
CEL came on. Autozone OBD says Code PO491--Secondary Air Injection Problem. All posts here seem to be for the 2.7T. Does the 4.2 have an SAIP? Where is it and the fuse/relay located? Thanks.
02-19-2010, 01:13 PM
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Most likely cause - bad or disconected vacuum lines
Do a quick search and you will find info on this. The following link - about half way down) shows pictures of possible vacuum line issues.
https://www.audiworld.com/forums/sho...php?p=15456441
Good luck.
https://www.audiworld.com/forums/sho...php?p=15456441
Good luck.
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