[BYprodriver]

Originally Posted by Batman10

Hello, my Cayman 987.1 152K miles is giving me a CEL with codes P0491 and P0492, secondary air injection system insufficient flow.

I my AOS failed and was replaced a few weeks ago, and was running great since then, with a smooth idle. The weird thing I got this after the car was already warmed up.


I searched the forums for ways to fix but seen no real clear resolution but replacing eveything in that system one at a time, Also are there two air pumps(one for each side/bank) and how can they both be bad at same time,

I live in CA and cannot just reset the CEL, block off and disregard.

any more insight or experience would be greatly appreciated thanks

Remove the exhaust manifolds To see if the SAI passages are blocked, clean with brake cleaner spray.