OK...this is getting frustrating!! I have done series of checks and can't seem to get the check engine light to go off. I get a generic error code P410 - secondary air system. I changed the air pump and cleared the code. came back on after driving for approx 20 miles.

Anyone have this code come up for another reason?
What should I look for next?
Does anyone know what circuit the pump is on? Is there a fuse or relay that can be checked an trace an electircial problem back to the pump?

Please Help!!

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1999 ML430
2001 Land Rover Discovery II
2001 Lexus IS300
1996 Convertible Cobra
1965 Olds 442 - Weiand 8-71