po161 ford expedition 2001

Question

ford 2001 expedition 4.6 engine code po161 heater circuit open how do i fix this what is it

Answer 1

HI there,

This code is for the bank 2 rear O2 sensor. This is the sensor after the catalytic converter on the passenger side of the engine. This is usually the sensor heater that fails and replacing the sensor solves the problem.