Possible causes – Faulty Air Fuel Ratio Sensor 1 Bank 1– Air Fuel Ratio Sensor 1 harness is open or shorted– Air Fuel Ratio Sensor 1 circuit poor electrical connection Tech description There is a service bulletin for the following models: 2005-2006 Nissan Altima2005-2006 Nissan Altima Factory Service Bulletin OBDII Code P1031 2004 Nissan Maxima…