I have a 2008 Trailbalzer LT, which I installed a new K and N air intake on, as well as a throttle body spacer. My check engine light came on and gave me the code P0418, which says secondary air injector relay malfunction. I went to Advance auto and got a new relay, but that did not turn the light off. I pulled the fuse to reset the computer but the light came on a few hours later again. Can someone help me with potential fixes?