HellGrace

Hi! Check engine light was on for month and finally I got time to take it for a scan. Result came and show : P0161 O2 sensor Heater Circuit Malfunction(Bank 2 sensor 2) P1135 A/F Sense Circuit Heater Malfunction(Bank 1 sensor 1) Engine is 2AZ-FE with total 2x O2 sensor(top) and 2x A/F Sensor(below) Model is ACR-30R 8 seater. Exactly which one is faulty? I am confused with the "Bank 2" since I am running with 4 Cylinder engine not the V6 one. Thanks!