There are two relays in the 2008 Toyota Tundra that control the secondary injection system. Both are located in the engine compartment fuse box under driver side fender next to the battery. Both relays are 50 amp, bank one is located in slot 45 and bank 2 is located in slot 46. If the relay is bad, replace it with the same amperage rating relay as the original. The secondary air injection system pushes air into the exhauSTStream why do the exhaust gases to have a fuller burn. A bad pump is usually the most common issue with the system, but electrical issues can cause the pump to fail.
ossie
October 16, 2020
How do you remove and replace A circuit relay on 208 Toyota tundra 4.o
Juliette W.
April 9, 2020
The 2008 toyota tundra secondary air injection system relay is in the main fuse box under the hood
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