Got P0161 code, relpaced O2 sensor 2, bank 2. Passenger side behind the cat converter.

Question

What now, is it wiring harness?

Answer 1

Hi there

Yes, the next step is to check the wiring harness from the sensor to the computer. The code is for the heater circuit, so it could be shorted to power and sending to much voltage back to the computer. Also, check the fuses and make sure none are blown