Where is the Focus outdoor temperature sensor located?
2 Answers
Focus outdoor temperature sensor is located on the inner side of the front bumper, mounted on the anti-collision beam. Below are the detailed introductions about the outdoor temperature sensor: 1. Functions of the outdoor temperature sensor: First, it detects the ambient temperature outside the vehicle, and the control system determines the control mode based on the difference between the outdoor and indoor temperatures. Second, it provides the ECU with the temperature signal outside the vehicle. The ECU compares this signal with the indoor temperature signal to determine the temperature inside the vehicle, meeting the needs of the occupants. 2. A temperature sensor is a device that can sense temperature and convert it into an available output signal. Temperature sensors are the core components of temperature measuring instruments, with a wide variety available. According to the measurement method, they can be divided into contact and non-contact types. Based on the material and electronic component characteristics, they can be classified into thermistors and thermocouples. Modern temperature sensors are very small in size and are widely used in various fields of production practice.
During my years of driving a Focus, the location of the outdoor temperature sensor has been quite crucial—it's typically positioned near the front grille, right below the bumper or close to the air intake. Why this design? Because it needs direct exposure to the air to accurately measure external temperature, helping the air conditioning system intelligently adjust the cabin environment. I remember one instance when the displayed temperature was consistently too high, almost making me pass out from the heat in summer. Later, I found out the sensor was covered in bird droppings, and after cleaning it, everything returned to normal. When checking it yourself, you can spot it by opening the hood—it's a small component attached to a plastic part, but avoid poking it with hard objects as the wires can easily break. I recommend wiping off dust during annual car washes to prevent inaccurate readings from affecting driving comfort. If the readings keep fluctuating, it might be due to sensor aging or wiring issues—best to get it diagnosed at a repair shop.
