My advice is to take it to a muffler shop. You will save very little by doing it yourself.
Behind the engine connected to the exhaust system
Yes
It would be mounted in the exhaust pipe downstream of the catalytic convertor Helpfull
Bank 2 is the drivers side of the engine on your Ford Explorer Sensor 1 is in the exhaust before the catalytic converter ( upstream ) Sensor 2 is in the exhaust after the catalytic converter ( downstream )
Bank 1 is the passenger side of the engine on your Ford Explorer Sensor 1 is in the exhaust ( or exhaust manifold ) before the catalytic converter ( upstream ) Sensor 2 is in the exhaust after the catalytic converter ( downstream )
My Haynes repair manual shows 2 oxygen sensors mounted between the engine and catalytic converter(s) and 2 oxygen sensors mounted after the catalytic converter(s) which are called catalyst monitors and monitor the efficiency of the catalytic converter(s) on your 1997 Explorer XLT with the 4.0 L SOHC engine
Bank 1 is the passenger side of the engine in your Ford Explorer
Maybe the heat shield on catalyytic converter Maybe the heat shield on catalytic converter Maybe the heat shield on catalytic converter Maybe the heat shield on catalytic converter
You may have two- one in the exhaust manifold/downpipe, and the other just past the catalytic converter.
Bank # 1 is the passenger side of the engine Sensor # 1 is before the catalytic converter ( upstream ) Sensor # 2 is after the catalytic converter ( downstream )
Plugged fuel or air filter? Plugged catalytic converter?
drivers side of engine , after catalytic converter ( downstream )