No, of course not.
Bank 1 is the passenger side of the engine on your Ford Excursion Sensor 2 would be in the exhaust after it passes through the catalytic converter ( downstream )
the passanger side coming out of the heads, on the exhaust, before the catalytic converter
The 2004 Ford Excursion wheelbase is ( 137 inches )
The O2 sensor after the catalytic converter.
On a 2004 Ford Excursion : ( 166.6 liters / 44.0 U.S. gallons )
According to the 2004 Ford Excursion Owner Guide ( 226.7 inches long )
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 )
According to the 2004 Ford Excursion Owner Guide : ( 44.0 U.S. gallons )
The check engine light will illuminate and you will fail an emissions test.
How many catalytic converter are on a 2005 Ford Taurus
On the catalytic converter or exhaust manifold On the exhaust manifold or catalytic converter