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WRX Base
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Engine Performance
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Engine Control System (Diagnostics) (Except For STI) (1 Of 4)
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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
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Execution Condition
Secondary parameters
Execution condition
Battery voltage
≥ 10.9 V
Elapsed time after A/F sensor heater control began
> 21%