Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Coolant Temperature Sensor
The coolant sensor is located in the cylinder head on 3.7L engines. On the Federal 5.2L 2-barrel engine, the sensor is located in the charge temperature location on the intake manifold. On all other 5.2L engines the sensor is located in the intake manifold. The coolant sensor informs the SCC when the engine has reached normal operating temperature, so that proper adjustment can be made to the air/fuel ratio. It also prevents changes until normal operating temperature is reached. The coolant sensor also controls the amount of ignition timing advance or retard when the engine is cold.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.