P0161 Lexus - 01 is 300

Question

Where is this o2 sensor located? On my 01 IS 300.

Answer 1

Hi there,

This code is for a problem with the heated O2 sensor. Sadly there are 4 and the manufacturor doesn't specify which of the 4 are bad with this code. You will need a scan tool that can read the live data from the sensors to determine which one has a faulty heater.