Why is my O2 sensor code po161?
Why is my O2 sensor code po161? I replace my O2 sen cause I was having PO161 CODE after replacing my O2 sensor the CEL turned-off. 20 miles later PO141 and PO161 came back on. Any idea what is going? I order a replacement O2 SEN part thinking it's defective. What happens when a Lexus trouble code is not cleared? If the diagnostic trouble code is not cleared, it will be retained by the ECU and appear along with a new DTC in future trouble codes. If it is necessary to work on engine components requiring removal of the battery...