Bank 1 is the passenger side of the engine Sensor 2 is after the exhaust gas has passed through the catalytic converter ( downstream ) also known as a catalyst monitor
Bank 1 is the passenger side of the engine in your Ford Expedition Sensor 1 is in the exhaust before it enters the catalytic converter ( upstream )
Bank 2 is the drivers side of the engine in a Ford Expedition Sensor 1 would be in the exhaust close to the engine before the exhaust enters the catalytic converter ( upstream )
Bank 2 is the drivers side of the engine in a Ford Expedition Sensor 2 is after the catalytic converter ( downstream )
Bank 2 is the drivers side of the engine in your Ford Expedition Sensor 1 is in the exhaust BEFORE it enters the catalytic converter ( upstream )
Those are the oxygen sensors in the exhaust above the catalytic converters.
Bank # 1 is the passenger side of the engine in a Ford Expedition Sensor # 1 would be before the catalytic converter ( upstream sensor ) Sensor # 2 would be after the catalytic converter ( downstream sensor )
On a Ford Expedition : Bank 1 is the passenger side of the engine ( 4.6 and 5.4 )
Bank 1 is the passenger side of the engine in your Ford Expedition Sensor 1 is in the exhaust system before the exhaust enters the catalytic converter ( upstream )
On a 2000 Ford Expedition ( 4.6 and 5.4 ) Bank 2 is the drivers side of the engine Sensor 1 is close to the engine BEFORE the exhaust enters the catalytic converter
In center console...
On a Ford Expedition , 5.4 and 4.6 Bank 2 is the drivers side of the engine Sensor 2 is in the exhaust AFTER the catalytic converter ( downstream sensor also called the catalyst monitor )
On a Ford Expedition : Bank 1 is the passenger side of the V8 engines