Greetings all. This is second 06 Tundra I've owned that had this issue. First time I had no choice but to take to Toyota Service center for repair and $2600+ dollars and many Secondary Air system parts later it was good to go. Now on my second 06 Tundra and having same symptoms with P2440 code. So this time I tore into it, replaced SAS air pump, Diverter valve and both control/check valves. No help. Anyone have any ideas?? Thanks a million.