Question

On a 2006 Nissan Xterra 4.0L which sensor is bank 1 sensor 1? I got the OBD code P2A00

Answer 1

Bank 1 is the driver side. The sensor is the first sensor in the exhaust, usually the exhaust manifold. Normally access this through the wheel well on the driver side of the truck.

Answer 2

P2A00 NISSAN - Air Fuel Ratio Sensor Circuit Range/Performance Bank 1 Sensor 1
Read more: https://www.autocodes.com/p2a00_nissan.html

2005-2012 Nissan Xterra Air/Fuel Ratio and O2 Sensor Location
View Sensors Location: https://www.nissanhelp.com/diy/xterra/projects/2005_2012_nissan_xterra_air_fuel_o2_sensor_location.php