How To Reset Ambient Temperature Sensor

While you concentrate on driving, an ambient temperature sensor, which is a smart gadget, will keep the temperature at the optimum level at all times.

It monitors the temperature inside and outside the car using a temperature sensor.

The cabin temperature sensor allows the air conditioning or heating to maintain a comfortable temperature inside the vehicle.

For this reason, many consumers have this technology installed in their cars.

If our room temperature sensor is not giving us the best possible service, has deteriorated, or no longer works as it should.

What should we do? When the room temperature sensor fails, it is necessary to replace it or readjust the room temperature sensor to make it work properly.

How To Test Ambient Temperature Sensor

Like all other components, the ambient temperature sensor can also be damaged and cause a number of engine-related problems.

Therefore, it is recommended to inspect the car immediately to avoid any serious problems.

Here are some of the most common symptoms you may face if the ambient temperature sensor is damaged or malfunctioning.

1. Poor fuel efficiency

A faulty ambient temperature sensor can cause the onboard computer to provide an incorrect signal, which can result in improper fuel pressure management as a consequence of the problem.

For example, if a sensor malfunctions, it may provide a signal suggesting that the engine is cold when it is not, resulting in the need for more fuel to quickly warm up the engine.

This has a negative effect on fuel economy as well as engine performance.

2. Engine light activates

The check engine light will be one of the first signs you notice, and it will illuminate briefly.

A malfunctioning sensor circuit will cause the check engine light to come on, indicating to the driver that the vehicle is in need of repair.

3. Black exhaust smoke

Because of an erroneous temperature signal, the ECM may over-enrich the fuel mixture to the point where it interferes with the combustion process, causing it to stall.

Excess fuel will be burned in the exhaust pipe, resulting in a dense, black cloud of smoke.

4. The engine overheats

The engine cooling fan, located behind the radiator grille, is responsible for removing heat from the engine coolant.

This fan is electrically operated and is controlled by a signal from the computer. If the fan receives a false signal, it may not activate, causing the engine to overheat.

Some vehicles have a separate coolant temperature sensor for the fan, although most use the same sensor.

5. Poor idle

Due to a faulty ambient temperature sensor, the fuel mixture will adjust accordingly.

This will cause the engine to vibrate or shake when the car is at low speed and will give other power losses and strange behavior.

Now that you have determined that your sensor is faulty, it is time to repair it. Depending on the condition of the sensor, you will either have to reset it or uninstall it.

In most cases, resetting the system will suffice, and it will also save you money over upgrading the device. Let’s see if we should carry this out.

Ambient Air Temperature Sensor Location

The outside or ambient temperature sensor is a sensor that is installed in the front of the vehicle, specifically in the bumper where the grilles through which the air that enters the engine circulates are located.

This sensor determines the temperature of the outside of the vehicle to take informative data and display it to the driver.

How To Reset Ambient Temperature Sensor

We recommend that you try to reset the temperature sensor before fixing it, as it usually fixes a faulty sensor.

1. Location of the Sensor

The first step in resetting the sensors is to locate their location so you can easily reach the device.

The unit is usually located at the front of the vehicle (as mentioned above). You can move on to the next step after you have found the sensor.

2. Removing the device

Before you start with any electrical equipment you need to unplug the power, so remove the battery.

Uninstall the device and look for the plastic clip that attaches the sensor to the vehicle wiring. Proceed with care, as the wiring or the entire system may be compromised.

3. Resetting the Sensor

Next, you need to reset the device, which is the most important step. Locate and press the reset button on most ambient temperature sensors.

You may try to clean the device after unplugging it, as dust can interfere with an accurate ambient measurement.

4. Mounting all equipment

Install the equipment as before, reattaching the clip or screwing it back into its original position. After attaching the charger, you should test the sensor.

5. Examine the reading

You should try to synchronize the data from any real-time weather application.

This is the time to see if the sensor is normal. The procedure is repeated until the reading on the car’s temperature gauge matches the outside temperature.


This is all it takes to reset your vehicle’s ambient temperature sensor; just follow the instructions and complete the procedure yourself.

If your ambient temperature sensor is broken or outdated, you may need to replace it. Follow the instructions above, but instead of using the old device, use a new one to reinstall it. Check the reading and you are ready to go.

Liam Dare

As CEO of, my passion for the automotive world motivates me to build online businesses that provide information and entertainment to users. I am proud to contribute in a positive way to the automotive community.