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P0131 A/F SENSOR 1 EC-175 < DTC/CIRCUIT DIAGNOSIS > [HR16DE] C D E F G H I J K L M A EC N P O YES >> GO TO 5. NO >> Repair open circuit, short to ground or short to power in harness or connectors. 5. CHECK INTERMITTENT INCIDENT Perform GI-41, "Intermittent Incident" . Is the inspection result normal? YES >> Replace malfunctioning air fuel ratio (A/F) sensor 1. Refer to . NO >> Repair or replace. |