P2096 Mazda - Post Catalyst Fuel Trim System Too Lean Bank 1

Question

I have a Mazda 3 2006 with this code what it means?

Answer 1

P2096 Post cataytic fuel trm too lean

This code represents a condition with the  engine. Any  modifications to the engine? Any cold air intake kits installed ? Any exhaust leak prior to the front 02 sensor (airflow sensor is what is used). What need to be look for is false air and this includes the air duct from the MAF (mass airflow) to the throttle body