Question

On my 2005 Nissan Quest, where is the location for air-fuel sensor 1 heater bank 2? I got the engine code P1051

Answer 1

Hi there,

The sensor heater is part of the A/F sensor. This is the first O2 sensor in the exhaust system on the exhaust manifold in the front of the engine closest to the radiator.

Answer 2

For the location of other sensors visit here: https://www.nissanhelp.com/diy/quest/projects/2004_2009_nissan_quest_air_fuel_o2_sensor_location.php