Check Engine Light Due to Restricted Secondary Air Injection Check Valve on Cadillac Escalade

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 157,000 (157,000–157,000)
5 model years affected: 2002, 2003, 2004, 2005, more2006
7 people reported this problem
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P0410 code is on and ses light is on. Don't know if the pump is out of if it's the check valves. Fuse isn't blown ( I think I'm looking at the right fuse) 50 amp under hood labeled blower. Any help would be great thank you.