Coolant temperature sensor location for replacement?

Your vehicle uses a cylinder head temperature (CHT) sensor and it should be on the top front of the engine or maybe left side of engine if for the 4.2L engine.

Here is a guide to help you see what you are in for when changing it out.

https://www.2carpros.com/articles/coolant-temperature-sensor-cts-replacement

Check out the diagrams (Below)

Please let us know if you need anything else to get the problem fixed.

Cheers

Good morning,

The signal for the gauge comes from the sensor to the ECM and then to the dash gauge.

I would remove the connector and test for 5 volts to the sensor and also check the return voltage as well.

https://www.2carpros.com/articles/how-to-check-wiring

Based on what you have done, it sounds like you may have pinched the harness when installing the intake. Look at the back of the intake and make sure the harness is free and not damaged.

https://www.2carpros.com/articles/how-a-coolant-temperature-sensor-works

https://www.2carpros.com/articles/symptoms-of-a-bad-coolant-temperature-sensor

Roy

The Cylinder Head Temperature (CHT) sensor:
is mounted into the wall of the cylinder head and is not connected to any coolant passages.
sends a signal to the powertrain control module indicating the cylinder head temperature.
if the temperature exceeds 126°C (-258°F), the powertrain control module disables four fuel injectors at a time. The powertrain control module will alternate which four injectors are disabled every 32 engine cycles. The four cylinders that are not being fuel injected act as air pumps to aid in cooling the engine.
if the temperature exceeds 154°C (310°F), the powertrain control module disables all of the fuel injectors until the engine temperature drops below 154°C (310°F).
DTCs are set.
If the engine reaches critical temperature, the following happens:
The coolant temperature gauge pointer will read fully hot at 121°C (250°F).

Okay, check you wiring and let me know what you find.

Roy

You should have 5 volts to the sensor.

You need to put the red lead in one terminal and the black lead in the other terminal.

https://www.2carpros.com/articles/how-to-use-a-voltmeter

Do that with your voltmeter and tell me the reading.

Roy

Sensors should only have 5 volts.

I think somewhere the harness is shorted to power.

Roy

Hello,

The coolant temperature sensor is located near the front of the engine for both 6 and 8 cylinder engines. Here is a guide to help you see what you are in for when doing the job

https://www.2carpros.com/articles/coolant-temperature-sensor-cts-replacement

Here is the engine coolant sensor location for both engine (below)

Let us know what happens and please upload pictures or videos of the problem.

Cheers

Not in the engine harness to the ECM. There is no fuse in that circuit as the ECM controls all the grounds or returns. The ECM can handle a short to power.

Roy

Excellent addition to this thread! Please feel free to use 2CarPros anytime!