ok i'm pretty pissed right now,
i did more searching and found: P0412 code = An open or shorted condition detected in the secondary air (air switching/aspirator) solenoid control circuit.

so i check all hoses, took off airbox, the secondary air pump, blew in it, etc, all fine, i check the vaccum hose, all good, then i take the engine cover off, and suprise suprise
solenoid wires chewed!!! that f***** rat/mouse got in there again
there's new foam from engine cover freshly chewed (new color) from last time it happened, and looks like chewed the 2 wires going into the solenoid.
i'm pretty pissed (last time it was a vaccum line that got chewed, now this).

i better start parking in the garage at night, warm engine, cold weather, attractive for rats/mouse
time for some poison, grrrrr