check engine light

hi folks. every so often i get the check engine light on the cobra. its usually when im sat at a set of lights but its throwing up codes 0174 and 0411. they dont cmoe up at the same time but they appear at random. is there anything that relates to these codes?
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P0174 is system too lean on bank 2 and P0411 is secondary air air system with incorrect flow. More than likely you have a vacuum leak on bank 2 somewhere. I would check for any vacuum hoses disconnected, broken or cracked. Also check for vacuum leaks around intake gaskets. Try spraying some carb or intake cleaner around all intake joints while engine is running. If engine sound changes at some point, the vacuum leak is probably in that area. Try doing this test before engine is too hot since these cleaners are flammable.