HeaterControlCircuitRatio(A/F)sensor Low(Bank1Sensorheatercircuit 1)-A/Fsensorheater (sensor1) -Integrationrelay (EFIMAINrelay) -ECM P0032Oxygen(A/F)Sensor-ShortinA/FsensorComesonDTCstoredES-74 HeaterControlCircuitheatercircuit High(Bank1Sensor-A/Fsensorheater ...