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P015B Code – Oxygen Sensor Delayed Response Lean to Rich Bank 1 Sensor 1

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Code P015B Possible Causes
Heated Oxygen Sensor Bank 1 Sensor 1 circuit poor electrical connection
Heated Oxygen Sensor Bank 1 Sensor 1 harness is open or shorted
Low or high fuel system pressure
Engine vacuum leaks
Exhaust gas leaks
Faulty fuel injectors
Faulty Heated Oxygen Sensor HO2S Bank 2 Sensor 1
Fuel contamination

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