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On the 2008 Jeep Liberty, the coolant temperature sensor is located behind the right cylinder head underneath the air intake pipe. It is attached with simple clips that you can release to remove it, then unplug the wiring harness from the sensor. The sensor typically costs around $60, and if you have someone else do the job instead of doing it yourself, labor costs can range from $50 to $100, even though it's a straightforward task. Signs that the coolant temperature sensor is failing include decreased fuel efficiency, engine overheating, and occasionally seeing black smoke coming from the engine, which can be quite concerning.
The coolant temperature sensor in the 2008 Jeep Liberty can be found situated in the coolant pipe, positioned beneath the air intake pipe and situated behind the right cylinder head.