u/No_Reference3879

I have a 2009 ford flex limited, check engine light came on, it said the o2 sensor circuit HO2S Heater control circuit, HO2S Heater resistance, 02 sensor heater circuit were all having a problem, all bank 1 sensor 1 except the 02 heater circuit which was bank 2 sensor 1, what is the issue? I just replace my upstream 02 sensor. HELP