LEMON Manuals
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2024
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Forester Base
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Repair and Diagnosis (Single Page)
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Engine Performance
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System
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Engine Control System (Diagnostics) (1 Of 4)
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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
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DTC P0031: A/F/O2 Heater Control Circuit Low Bank 1 Sensor 1
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General Description
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Component Description
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Component Description
Courtesy of SUBARU OF AMERICA, INC.
(A)
Battery voltage
(B)
Front oxygen (A/F) sensor heater output voltage
(C)
128 ms
(D)
Low error