hello fellow members this is my 1st post and in need of help i have a 03 navigator 5.4 3v im getting a check engine light code p0117 i changed thermostat and 2 sensors one in back of pass hed and the other one next to the themostat . cooling gauge goes half way and then it just dies auto zone gave me this sensor part number # SU8781 its lite brown with 2 wire clip i been looking and just cant find nothing thx for ur help in advance