Originally Posted by joeydover
2000 psd has -40* on computer datastream. need location on sender, keep getting wrong one from dealer & parts store. gauge works fine. oil temp is fine also.
The coolant temp sensor is located just next to the thermostat housing and heater outlet on the water pump. It's a 2 wire sensor and very common. When replacing check for a green colored corrosion, common with sensors. It's called fletching. It's caused by micro arcing of the sensor circuits and builds up over time. If there is fletching clean corrosion ands if you have some available add dielectric of some sort of electrical grease to the connector to prevent this.