Coolant Temperature Sensor Location

The coolant temperature sensor on a 2008 Ford Explorer is typically located on the thermostat housing. There are actually two sensors in this area:

1. The sensor on the driver's side of the thermostat housing sends information to the engine's computer.

2. The sensor on the passenger side sends information to the temperature gauge on your dashboard.

These sensors are crucial for monitoring engine temperature and ensuring proper engine management.

Identifying the Sensors

The engine coolant temperature (ECT) sensor, which communicates with the engine control module, usually has green and red or gray and red wires. The temperature gauge sensor typically has red and white or black and white wires.

Accessing the Sensors

To access these sensors, you may need to remove some components:

  • Remove the air intake tube
  • Disconnect the throttle cable (and cruise control cable if applicable)
  • Move aside any wiring harnesses or hoses obstructing access

Replacing the Sensor

When replacing a coolant temperature sensor:

1. Ensure the engine is cool before starting work.

2. Drain some coolant from the radiator.

3. Unplug the electrical connector from the sensor.

4. Remove the locking clip (if present) using a small screwdriver.

5. Use a 3/4-inch wrench to unscrew the sensor.

6. Install the new sensor with a bit of coolant on the O-ring for lubrication.

7. Tighten the sensor and reconnect the electrical connector.

8. Refill the coolant system and check for leaks.

Important Considerations

  • Always use the correct replacement sensor for your specific Explorer model.
  • Be careful not to overtighten the sensor when installing, as this can damage the threads or the sensor itself.
  • After replacement, clear any engine codes and ensure the temperature gauge is functioning correctly.

Remember, if you're not comfortable performing this task, it's best to consult a professional mechanic to avoid potential damage to your vehicle's cooling system.