On the 4.0 SOHC V6 it is located on the left valve cover near the engine oil filler cap. On the 4.0L pushrod it is located at the rear of the engine block.
The 1997 Ford Explorer ambient temperature sensor can be found on the bottom of the drivers side mirror. The engine coolant temperature sensor can be found on the front of the engine.
Under the driver's side front corner of the car, behind the bumper.
The outside temp sensor is located on the passenger side of grille by radiator
Bank 2 is the drivers side of the engine in a Ford Explorer Sensor 1 would be somewhere in the exhaust before the catalytic converter ( upstream )
Bank 2 is the drivers side of the engine in your Ford Explorer Sensor 1 is in the exhaust , close to the engine , before the catalytic converter ( upstream sensor )
Bank 1 is the passenger side of the engine in your 1997 Ford Explorer ( V6 engines and V8 engine ) Sensor 1 is before ( upstream ) the exhaust enters the catalytic converter Sensor 2 is after ( downstream ) the exhaust leaves the catalytic converter
To the best of my knowledge, the 97 does not have a MAP sensor. It uses a Mass Airflow sensor instead, and that is located in the intake boot either next to the air filter housing, or in the housing itself.
Bank 1 sensor 3 should be the one after the catalytic converter.
the oxygen sensor or 02 sensor is usually located on you headers it should take a 5/8 wrench it will have two wires coming off of it.
Bank # 2 is the drivers side of the engine Sensor # 1 is in the exhaust before the catalytic converter
On a 1997 Ford Explorer XLT : Bank 1 is the passenger side of the engine ( 4.0 liter SOHC , V6 , and 5.0 liter V8 ) Sensor 1 would be close to the engine BEFORE the exhaust enters the catalytic converter
bank 1 is the passenger side of the engine sensor 2 is after the exhaust has passed through the catalytic converter ( downstream )