Try to get a resistance reading of the sensor so that you can compare the resistance when cold with the resistance when its hot. Just unplug the wire and measure the sensor directly.

Also, I think there is one sensor the dash temp gauge and one for the pcm. I though the dash temp gauge was one wire where the pcm sensor was two-wire.
Anyone else jump in here for verification?
If not I will try to look today.

warmonger

Former owner of '99 CSVT - Silver #222/2760 356/334 wHP/TQ at 10psi on pump gas! See My Mods '05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red '06 Mazda5 Touring, 5spd,MTX, Black