1996 Ford Explorer Trouble Code

P0141 - Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)

Diagnostic fault codes never say to replace parts or that they're bad. They only indicate the circuit that needs further diagnosis or the unacceptable operating condition. In this case the heater could be malfunctioning inside the sensor but it's much more likely there's a problem in the wiring going to it. Specifically the most likely suspect is a corroded terminal in a connector. Next would probably be a broken or cut wire.