Air temp sensor problems

[95Blue240sx]

I've done search and found nothing on what im dealing with. the problem is i got code 41, air intake temp sensor. so i replaced the sensor and rest the ecu. i start the car and within a minute the check engine light come back on. i check it again and its code 41. so i start the car unplug the sensor and check to see if it is getting voltage, and it is not. so im thinking maybe that it god cut somewhere going to the sensor. im about to go check to see if i get voltage from the line coming out of the ecu. then ill go from there. i do not have an intake or anything. just a drop in filter. but i've had the filter in there for a couple years now and the check engine light came on about 2 weeks ago. help me out. thanks!