On top of the dash near the windshield.
According to the owner's manual - headlight bulb # 9007
where the ford symbol is
According to the 2003 Ford Explorer Sport Trac Owner Guide : ( # 9007 bulb is used in the headlights )
Its part of the MAF sensor. In 98 they integrated it.
On your 1998 Ford Explorer Sport : The mass air flow sensor is between your engine air filter and the big rubber engine air intake tube
Intake air Temp sensor, should screw into the side of your air cleaner housing.
Bank 2 is the drivers side of the engine in your Ford Explorer Sensor 2 is after the catalytic converter ( downstream )
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Bank 1 is the passenger side of the engine in a Ford Explorer Sensor 2 is in the exhaust after the catalytic converter ( downstream )
The sensor is located under the oval shaped panel on top of your dashboard. Should pull right up and you will see the sensor attached to the bottom of this panel.
Could be that the sensor in the door isn't registering that the door is closed.
The temperature will keep the 1986 ford tempo automatice transmission to stay in first gear because this car was design for the cold. Changing the gear to early and a cold temperature could ruin the car.