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The coolant gauge temp sensor is a one wire sensor located on the right rear of the engine block.
Some vehicles have two these days. One is for the ecm and the other is for the gauge. Coolant sensor is for the ecm, I think.
There is usually an ECT (engine coolant temp) sensor and a CTS (coolant temp sensor) located around the thermostat housing mounted in the intake. One sends coolant temp to the guage, the other sends temp to computer.
If you unplug sensor and one or both fans come on.
The coolant temp sensor on a 2003 Chevy S10 V6 is located on the front of the intake manifold. To replace simply unscrew the old sensor and screw on the new one.
The G20 has two coolant temp sensors, one temp sensor is at the front on the engine, it has two wires and is next to the thermostat housing, this sensor feeds info the the vehicle ECU. The other sensor is one wire feed and situated on the side of the engine (drivers side) this gives info to the temp gauge on the dashboard.
My Knowledge is temp. coolant sensor the small one.
it is located on the driver side between cylinders one and three
Coolant temp sensors are typically somewhere on the intake or on the cylinder heads. They have no more than 2 wires going to them, most of the time only one.
inlet air temp should be between the throtle and air filter box on the air intake hose coolant temp should be close to were the upper radiator hose connects to engine there maybe 2 coolant sensors one for computer one for radiator cooling .
It's located under the distributer, but there are three of them and they are all different. one for the gauge one for the ECM and one more for the a/c