Code P0410 Chevy Venture 2000

I have a P0410 code Secondary Air Injection System Malfunction. Can anyone tell me what this means and what I need to replace?

problem with the smog pump or pollution pump as it's sometimes called!
is likely

Thanks for the reply. Other research has indicated the air pump or a fitting leak. Gives me a starting point. Thanks again.

Love P0410. Been looking at this code for 2 years. Can't pass emissions with a set code. My 2000 Venture was designed by morons. They made an electric compressor, hung it with the sealed motor down. Rule of compressing air, the water vapor it contains condenses into water. First it fills the tube running to the check valves and eventually floods the pump,corrodes the seals to the motor, floods the motor shorting it out.
Finally finished with my repairs and modifications and ready to take through inspection this week (without an agonizing waiver process).
Replaced motor hidden in wheel well (don't forget to change blown fuse). Drilled an 1/8" weep hole in the bottom of rubber motor cover. Drilled an 1/16" weep hole in rubber hose at its low point just past frame rail adjacent to wheel well. Replaced the checked valves at the exhaust manifolds (I love rotating engine forward). And just to be on the safe side, Gave Napa $30 for the relay near the radiator, passenger side. Also, make sure you don't have vac leaks, the check valve don't work without the proper vacuum.