Skip the auto shop - Our mechanics make house calls

How to Replace an Intake Air Temperature Sensor

hand replacing an intake air temperature sensor

The intake air temperature (IAT) sensor, otherwise known as the air charge temperature sensor, is used by the powertrain control module (PCM) to determine the temperature (and therefore the density) of air entering the engine. Typically, the PCM sends a 5-volt reference to the IAT sensor. The IAT sensor then varies its internal resistance according to air temperature and sends a return signal back to the PCM. The PCM then uses this formation to determine fuel injector control and other outputs.

A bad IAT sensor can cause all kinds of drivability problems including a rough idle, surging, stalling, and poor fuel economy. To replace this part, you can follow the step-by-step guide below.

Part 1 of 2: Removing the old intake air temperature sensor

In order to safely and efficiently replace your IAT sensor, you will need a couple of basic tools.

Materials Needed

replacing an intake air temperature sensor diagram

Step 1: Locate the sensor. The IAT sensor is usually located in the air intake boot, but it may also be located in the air cleaner housing or intake manifold.

hand disconnecting the negative battery cable

Step 2: Disconnect the negative battery cable. Disconnect the negative battery cable and set it aside.

hand removing the electrical connector

Step 3: Remove the sensor’s electrical connector. Now that you know where the IAT sensor is located, you can remove its electrical connector.

had removing the sensor

Step 4: Remove the sensor. Carefully remove the faulty sensor, keeping in mind that some sensors simply pull straight out while others must be unscrewed using a wrench.

Part 2 of 2: Installing the new intake air temperature sensor

hand installing the new sensor

Step 1: Install the new sensor. Install the new sensor by pushing it straight in or screwing it in, depending on the design.

Step 2: Reinstall the electrical connector. To enable the new sensor, you must now reconnect the electrical connector.

Step 3: Reinstall the negative battery cable. As a final step, reinstall the negative battery cable.

As you can see, replacing an intake air temperature sensor is a pretty straightforward process that most can manage with very few materials. Of course, if you’d rather have someone else do the dirty work for you, the team of certified mechanics at YourMechanic offers professional intake air temperature sensor replacement.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

How to Buy Fuel Treatments
Adding a fuel additive to your gas tank when you fill up is one way to clean vital engine parts of deposits, improve the performance of your engine,...
Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...


Related questions

Q: 95 Civic will not start it cranks but doesn't turn on

The code 3 is for the manifold absolute pressure sensor. These sensors are known to go bad. There are used and cheap aftermarket ones online that do not always fix the problem. I'd recommend using a quality replacement part to...

Q: Hard time starting my truck

The symptoms you describe are in line with a faulty air charge temperature sensor. As you may know, the air charge temperature sensor measures the temperature of the air coming into the engine. As cold air is much more dense...

Q: Electrical issue

Thanks for writing in about your 2006 Saturn. It looks like you've inspected all of the usual suspects, but one item you might want to look at is the battery temperature sensor. Battery temperature sensors detect the temperature of the...