To add to Inspectors well done post, here is a chart showing the values of the Sensor in relationship to temp.

Note that the temp/resistance are inverse [ these are called Negative Thermistors]
An ohm meter and temp comparision will tell if you are in spec.

Temp C -- Ohms
0-5900
20-2500
40-1170
50-830
60-600
70-435
80-325
90-245
100-185

So, basically, the car leans out as temp increases [ along with ignition changes per the ECU mapping]