Hi I'm new here, driving Jap import 2002 Demio for almost 5 years. I just keep getting pre-cat oxygen sensor fault code but I cannot locate where it is. Engine is 4at 1.5 liter 113ps zy-ve. Mazda's schematics shows where it is;

Mazda MAZDA 2 DY 2003-01 Mazda Engine Switches & Relays (18-861b coded part)

But it's not there. I'm confused. I would be happy if anyone knows exact location.

 

Lean forward and look down between the engine and bulkhead and you will see it in the manifold. Thats the first sensor (sensor 1 bank 1 )