Bank 1 is the passenger side of the engine in your E-150
Sensor 1 is between the engine and the catalytic converter ( upstream sensor )
On a 2002 Ford E-150 : Bank 1 is the passenger side of the engine ( V6 and V8 engines ) Sensor 1 would be close to the engine BEFORE the exhaust enters the catalytic converter ( upstream sensor )
It is located on the lower intake manifold on the driver side of the engine. It is close to the front of the engine.
On a 2002 Ford E-150 : The Mass Air Flow Sensor is INSIDE a round shaped plastic housing located between the engine air filter and the engine air intake tube
on the right side of the engine
Which temperature sensor? There is an air-fuel charge sensor, and a coolant temp sensor.
I have a '95 E150 and a '96 E250, both are 4.9 straight 6 cyl. One has 1 O2 sensor and the other has 2, one on each half of the exhayst manifold. I believe the 96 has 2. but it is an E250, not sure about the '96 E150.
It is mounted to the throttle body.
On a 2001 Ford E-150 : The Mass Air Flow sensor is between the engine air filter and the engine air intake tube . ( it is INSIDE a round shaped plastic housing )
It is located on the Left Side ( facing the engine) by the Alternator.
The engine oil pan is bolted to the bottom of the engine
The o2 sensor is located on the right side of the engine compartment. You remove the inside engine cover,and it's underneath the exhaust pipe on the right side,below the exhaust manifold.It uses a 7/8th size wrench. The size of the o2 sensor prevents a common tool,a modified socket designed to remove and install o2 sensors,from being used.A standard wrench will work. Be certain that the threads of the new o2 sensor have some anti-seize lubrication on them.
There is only one coolant temperature sensor on a 1999 Ford E150 6 cylinder. The sensor is on the front of the engine just below the valve cover.