2001 Buick Lesabre Oxygen Sensor Location. (2) oxygen sensors type : It may be on the top of the exhaust pipe and hard to see.

The engine control module controls the air/fuel metering system in order to provide the best possible combination of drivability, fuel economy, and emission control.fuel delivery is controlled differently during open loop and closed loop. K, fi, naturally aspirated, gas. After catalytic converter, driver and passenger side components :