Tundra and Sequoia Air Injection System HowTo
http://www.tundraheadquarters.com/blog/tundra-sequoia-air-injection-induction-pump/
Causes and remediation options for Toyota Tundra owners with the UR 4.6/5.7L engines, a check engine light, and one or more of the codes:
P0418
P0419
P2440
P2441
P2442
P2443
P2445
P2447
It’s been brought to our attention that many 2007 or 2008 ...more
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Type: HowTo, TSB
Make/Model: Toyota Tundra
Engine: Toyota 4.6L V8, 5.7L V8
Diagnosing Tundra Air Pump Failures
http://forum.ih8mud.com/threads/air-pump-failures.402819/
Includes TSB and Technical Reference information on when the air pump runs.
The latest TSB is T-SB-0160-11 Rev 2
http://media.fixed-ops.com/Toy_ServiceBulletins/sb0160T11.pdf
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Type: HowTo, TSB
Make/Model: Toyota Tundra
Engine: Toyota 5.7L V8