Code P0043 Possible Causes
Heated Oxygen Sensor H2OS Bank 1 Sensor 3 circuit poor electrical connection
Heated Oxygen Sensor H2OS Bank 1 Sensor 3 fuse
Heated Oxygen Sensor H2OS Bank 1 Sensor 3 harness is open shorted
Faulty Engine Control Module ECM
Faulty Heated Oxygen Sensor H2OS Bank 1 Sensor 3

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