If it were the CTS, you should get a fault code. Nevertheless, the CTS is a steep negative-slope thermistor. Very approximate values would be: 15K to 22K ohms at about 25F to 30F ambient; 3K around 70F ambient; and with engine fully warm, about 600 ohms (as fast as you can shut the engine off and unplug the sensor to read it, the resistance will climb to over 1.3K).