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Batman10 · 10-25-2019, 08:48 PM

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

10-25-2019, 08:48 PM	#1
Batman10 Registered User Join Date: Aug 2018 Location: Los Angeles Posts: 6	Secondary air injection system issue 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