Where is this sensor located on a 2004 Toyota Tacoma 3.4 liter? (p0031)

Question

I need to know where to find this sensor for fault code p0031

Answer 1

you can check/replace the fuse first before replacing the sensor "AF Heater Relay" if that does not fix the the problem the Bank 1 Sensor 1 needs to be replaced, it is on the passenger side the first sensor before the catalytic converter