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P2270 Code – Oxygen Sensor Signal Stuck Lean Bank 1 Sensor 2

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Code P2270 Possible Causes
Heated Oxygen Bank 1 Sensor 2 circuit poor electrical connection
Heated Oxygen Bank 1 Sensor 2 harness is open or shorted
Low or high fuel system pressure
Engine vacuum leaks
Exhaust gas leaks
Faulty fuel injectors
Faulty Heated Oxygen Bank 2 Sensor 2
Fuel contamination

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