Possible causes – Air Fuel Ratio Sensor 1 Bank 2 harness is open or shorted– Air Fuel Ratio Sensor 1 Bank 2 circuit poor electrical connection– Faulty Air Fuel Ratio Sensor 1 Bank 2 Tech description There is a service bulletin for the following models: 2005-2006 Nissan Altima2005-2006 Nissan Altima Service Bulletin P1051 OBDII Code…