Some 2005 - 2009 model year 4Runner, 2006 - 2007 model year Land Cruiser, 2005 - 2007 model
year Sequoia, and 2005 - 2006 model year Tundra vehicles equipped with the 2UZ-FE (4.7 L) engine
may exhibit a MIL "ON" condition for the following Diagnostic Trouble Codes (DTCs):
• P0412 - Secondary Air Injection System Switching Valve "A" Circuit
• P0418 - Secondary Air Injection System Relay "A" Circuit
• P1440/P1443 - Secondary Air Injection System Control Valve Circuit Bank 1 I Bank 2
• P1441/P1444 - Secondary Air Injection System Switching Valve No. 2 Bank 1 I Bank 2
Stuck Open
• P2440 - Secondary Air Injection System Switching Valve Stuck Open Bank 1
• P1442/P1445 - Secondary Air Injection System Switching Valve No. 2 Bank 1 I Bank 2
Stuck Close
• P2441 - Secondary Air Injection System Switching Valve Stuck Close Bank 1
• P2445 - Secondary Air Injection System Pump Stuck Off Bank 1
This condition may be caused by debris passing through the air injection pump assembly and
contaminating various components in the system. Use the following procedure to address this
condition.
