Where is the shift sensor located on a 1998 dodge

It is located on the front of the transmission. you will see 2 of them one on the left under small transmission lines it is the input then to the right behind the radiator overflow there is the other one. Easiest way to change them is with a 1" deep well socket

Source: transmission input speed sensor location

First thing I would check is the fuse or the fan relay, located in the power distribution box under the hood. If that's not the problem, then I would find the coolant temperature sensor, unplug it with the key on and the fans should run.

Source: radiator fans not working 1998 dodge caravan

Your vehicle dose not have a maf sensor. They used a map sensor it is on the engine located under the front of the breater where it attaches to the engine.

Source: I need the location of MAF sensor in a 1998 Dodge

It's on the right rear engine compartment.

Source: blower motor resistor location on 1998 dodge

Oxygen Sensor I think that bank1 sensor1 stands for the upstream o2 sensor vs. the sensor2 which is the downstream o2 sensor. Both the 4 cyl. and 6 cyl. employ 2 o2 sensors.

If you get it wrong, changing both might be a good idea.
Removal & Installation 2.4L Engine NOTE: These engines use 2 heated oxygen sensors.
Upstream HO2S1 To Remove:
NOTE: If the engine temperature is lower than 120 °F (48 °C), the HO2S1 sensor may be difficult to remove. Excessive force could possibly damage the threads in the exhaust manifold.

1. Disconnect the negative battery cable.
2. Raise and safely support the vehicle.
3. Disconnect the electrical connector from the sensor.
4. Using an oxygen sensor removal tool carefully remove the heated oxygen sensor.

To Install:

1. Clean the threads in the exhaust manifold with an 18 mm X 1.5 + 6E tap.
2. If reusing the original sensor, coat the sensor threads with an anti-seize compound. New sensors come treated with anti-seize compound on the threads and do not require an additional coating.
3. Install and tighten the sensor 20 ft. lbs. (27 Nm).
4. Connect the electrical connector and install the wiring on the bracket.
5. Lower the vehicle.
6. Connect the negative battery cable.

Downstream HO2S2 To Remove:
NOTE: If the engine temperature is lower than 120 °F (48 °C), the HO2S 2 sensor may be difficult to remove. Excessive force could possibly damage the threads in the exhaust pipe.

1. Disconnect the negative battery cable.
2. Raise and safely support the vehicle.
3. Disconnect the electrical connector from the oxygen sensor.
4. Use an oxygen sensor socket to remove the sensor from the catalytic converter.

To Install:

1. If reusing the original sensor, coat the sensor threads with an anti-seize compound. New sensors come treated with anti-seize compound on the threads and do not require an additional coating.
2. Install and tighten the sensor 20 ft. lbs. (27 Nm).
3. Connect the electrical connector to the sensor.
4. Lower the vehicle.
5. Connect the negative battery cable.

3.3L & 3.8L Engines NOTE: These engines use 2 heated oxygen sensors.
Upstream HO2S1 To Remove:
NOTE: If the engine temperature is lower than 120 °F (48 °C), the HO2S1 sensor may be difficult to remove. Excessive force could possibly damage the threads in the exhaust manifold.

1. Remove the battery and battery tray.
2. Disconnect the speed control vacuum harness from servo.
3. Remove the cruise control servo and bracket. Place it out of the way.
4. Disconnect the electrical connector from the oxygen sensor.
5. Use an oxygen sensor socket to remove the sensor.

To Install:

1. Clean the threads in the exhaust manifold with an 18 mm X 1.5 + 6E tap.
2. If reusing the original sensor, coat the sensor threads with an anti-seize compound. New sensors come treated with anti-seize compound on the threads and do not require an additional coating.
3. Install and tighten the sensor 20 ft. lbs. (27 Nm).
4. Connect the electrical connector to the sensor and install the sensor on the bracket.
5. Install the cruise control servo.
6. Install the battery tray and battery.

Downstream HO2S2 To Remove:
NOTE: If the engine temperature is lower than 120 °F (48 °C), the HO2S 2 sensor may be difficult to remove. Excessive force could possibly damage the threads in the exhaust pipe.

1. Disconnect the negative battery cable.
2. Raise and safely support the vehicle.
3. Disconnect the electrical connector from the oxygen sensor.
4. Use an oxygen sensor socket to remove the sensor from the catalytic converter.

To Install:

1. If reusing the original sensor, coat the sensor threads with an anti-seize compound. New sensors come treated with anti-seize compound on the threads and do not require an additional coating.
2. Install and tighten the sensor 20 ft. lbs. (27 Nm).
3. Connect the electrical connector to the sensor.
4. Lower the vehicle.

Source: O2 sensor bank1 sensor 1 where is it located on

input and output speed sensors are located on the side of the transmission case across from each other. they are plastic and screw into the trans on 3.3l and 3.8l 3.0 may have the sensor where the pass side axle goes into the tranny

Source: transmition sensor location