How do you fix a secondary air injection system malfunction on a 2005 Chevy trailblazer?

Answer 1

I had the same problem. First is it recommended to comand the air pump on that is located underneath the driver seat bolted to the frame. If that turns on then the motor is good. Then it said to check the 2 hoses connected to the pump and that run to the selenoid to the top left of the motor to see if the hoses are clogged. Then I removed the selenoid located on the left of the motor, and fed power and ground from a external power source on the two pins of the selenoid. It didnt open and then replaced the seleniod, ran through a drive cycle and it was fixed correctly