Home >> Subaru >> 2018 >> Impreza Base, 4D Sedan, Automatic CVT Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) (P000A To P015B) >> Diagnostic Procedure With Diagnostic Trouble Code (DTC) >> DTC P0030: A/F / O2 Heater Control Circuit Bank 1 Sensor 1 >> Component Description