My 96 4.o ranger keeps throwing a po141 rear oxygen sensor code. I replaced the sensor and it keeps throwing a po141 code. I have to smog this truck and need help. Any ideas?? thanks.

 

did you clear the codes in the PCM after you changed the part? or maybe the new part is bad.

 

The P0141 code is for the O2 sensors heater circuit. So look to the wiring, connector, contacts, or lack of power to the sensors heater crcuit, or as has been said, maybe the new sensors heater is bad.

More thoughts for pondering, let us know what you find.