The 3 codes 1133.1135.125 You need to replace bank 1 (firewall side) air/fuel ratio sensor (oxygen sensor)
The p1354 is a vvti malfunction. thats a bit more complicated... I would repair the a/f sensor, and clear the codes, and drive it
Yes, On the manifold.
You have a problem with the bank 2 vvti system. Thats why its running crappy. Possibilities are Timing is off (unlikely since it took so long to malfunction)
vvt-i actuator or the oil control valve (turns on actuator) . It needs to be active tested to diagnose further...
Also, motor may be sludged, causing the vvt-i to fail.