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DTC P2A00, P2A03 A/F SENSOR 1 EC-629 C D E F G H I J K L M A EC 5. CHECK HARNESS CONNECTOR 1. Turn ignition switch OFF. 2. Disconnect A/F sensor 1 harness connector. 3. Check harness connector for water. OK or NG OK >> GO TO 6. NG >> Repair or replace harness connector. 6. CHECK A/F SENSOR 1 POWER SUPPLY CIRCUIT 1. Turn ignition switch ON. 2. Check voltage between A/F sensor 1 terminal 3 and ground with OK or NG OK >> GO TO 8. NG >> GO TO 7. 7. DETECT MALFUNCTIONING PART Check the following. ● Harness connectors E108, M15 ● Harness connectors M72, F102 ● IPDM E/R harness connector E7 ● 15A fuse ● Harness for open or short between A/F sensor 1 and fuse >> Repair or replace harness or connectors. Water should not exit. PBIB2100E Voltage: Battery voltage PBIB1683E |