Check Engine Light Due to Restricted Secondary Air Injection Check Valve on Chevrolet Camaro

One or both secondary air injection check valves may become restricted causing poor air flow resulting in illumination of the Check Engine Light. It is often recommend to replace both check valves even if a fault code is set for only one bank of cylinders. Replacing only one valve may result in a return trip to the repair shop.

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Average mileage: 63,500 (55,000–72,000)
6 model years affected: 1997, 1998, 1999, 2000, more2001, 2002
10 people reported this problem
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problem details
I am having the same trouble but I have a 1997 30th anniversary edition. I am being told the parts are not made anymore so I am have a very difficult time finding the part to get the car repaired.
Codes show PO141 PO410 PO411 PO418 and PO1415. Estimated repair by local shop says $480.00 and that, according to them is a low estimate as they don't know what other parts may need to be replaced until they get in there. Love this old car, but maintenance is getting more and more costly every year.
check engine light for codes runing both banks
2002 Chevrolet Camaro 55,000 mi,
code p1415 secondary air inj. sys. bank 1