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P0051 Code – HO2S Heater Control Circuit Low Bank 2 Sensor 1

Code P0051 Possible Causes
Heated Oxygen Sensor Bank 2 Sensor 1 circuit poor electrical connection
Heated Oxygen Sensor Bank 2 Sensor 1 fuse
Heated Oxygen Sensor Bank 2 Sensor 1 harness is open shorted
Faulty Engine Control Module ECM
Faulty Heated Oxygen Sensor H2OS Bank 2 Sensor 1

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