How To Fix P0043? | HO2S Heater Control Circuit Low (Bank 1, Sensor 3)
What does the P0043 HO2S Heater Control Circuit Low (Bank 1, Sensor 3) mean? P0043 code gets triggered when the Engine Control Module detects that the voltage in the heater circuit of the oxygen sensor is lower than expected. Specifically, we’re talking about the oxygen sensor heater circuit for Bank 1, Sensor 3. When the…