turns out it was the air pump relay.It is one of the grey 4 prong relays that go in positions D,E & H in the eng compartment apparatus case. The air pump relay is position E, part #A 002 542 26 19.
I had swapped it out in the past to see if it was bad but it must have been a intermittent problem at the time. This time I swapped it with one of the eng circuit relays and the vehicle would not start. Bad relay for sure purchased a new one and code p0410 is gone now! Hope this helps someone else with trouble shooting a code P0410
