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Home >> Subaru >> 2017 >> Impreza Base, 4D Sedan, Standard 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 >> DTC detecting condition
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DTC P0030: A/F / O2 Heater Control Circuit Bank 1 Sensor 1: DTC detecting condition

Detected when two consecutive driving cycles with fault occur.

CAUTION: Use the check board when measuring the ECM terminal voltage and resistance. Ref. to ENGINE (DIAGNOSTICS) >General Description>PREPARATION TOOL>HOW TO USE CHECK BOARD .
NOTE: After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure. Ref. to ENGINE (DIAGNOSTICS) >Basic Diagnostic Procedure>PROCEDURE.
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