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Subaru
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2017
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Impreza Base, 4D Sedan, Automatic CVT Trans
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Repair and Diagnosis
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Engine Performance
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System
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Engine Control System (Diagnostics) (P000A To P015B)
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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
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DTC P0030: A/F / O2 Heater Control Circuit Bank 1 Sensor 1
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Execution Condition
Execution Condition
Secondary parameters
Execution condition
Battery voltage
10.9 V or more
A/F sensor heater control duty
More than 15%
Elapsed time after returning from the fuel cut
20000ms or more