There Is two On a Lincoln LS
No, there is no alternative.
2
You could, but the check engine light will turn on and the car will not run any better.
The O2 sensors on a Lincoln LS V8 are located in two main areas: upstream (pre-catalytic converter) and downstream (post-catalytic converter). The upstream sensors are typically positioned on the exhaust manifold or close to the engine, while the downstream sensors are found after the catalytic converters in the exhaust piping. To pinpoint their exact locations, it's best to reference a vehicle repair manual or diagram specific to the Lincoln LS V8 model year.
the emission lights could be comming on because your catalytic converter is not working right.
Bank1 is the passenger side of the engine in your Lincoln LS ( V6 and V8 ) Sensor 1 would be close to the engine before the exhaust enters the catalytic converter
On a 2003 Lincoln LS or Lincoln Town Car : Bank 2 is the drivers side of the engine Sensor 1 would be close to the engine BEFORE the exhaust enters the catalytic converter
On a 2002 Lincoln LS : Bank 1 is the passenger side of the engine ( on the 3.0 liter V6 and the 3.9 liter V8 engines ) Sensor 1 is close to the engine BEFORE the exhaust enters the catalytic converter
On a 2002 Lincoln LS , 3.0 liter V6 engine : Bank 1 is the passenger side of the engine Sensor 1 would be close to the engine BEFORE the exhaust enters the catalytic converter
Plugged catalytic converter?
On a 2004 Lincoln LS ( 3.0 liter V6 and 3.9 liter V8 engines ) Bank 1 is the passenger side of the engine Sensor 1 would be close to the engine before the exhaust enters the catalytic converter
Just look under the vehicle and count them and you will have your answer.