I have codes P0491 and P0492, supposedly 2ndary air injection malfunction i'm told. I have ecu, exhaust, and intake. Are these codes the ones everyone gets from adding intake or other mods? I've had my mods for like 20k miles and never any lights until this past week so i'm just wondering if it's related. I took my car to a guy I know before going to the dealer and he said they were emissions lights and may be under warranty even if your warranty is up (which mine is) because it's emissions related. Can anyone with experience fill me in? Thanks

 

I know nobody reads check engine light posts but c'mon... ha.