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Home >> Oldsmobile >> 1995 >> Aurora >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 4.0L >> ECM/Pcm Code Charts >> Code 44, Bank 1 Oxygen Sensor Lean Exhaust >> Fuel Contamination

Fuel Contamination

Water, even small amounts, near in-tank fuel pump inlet can be delivered to injector. Water may cause a lean exhaust and set Code 44.