Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. How to Replace an Intake Air Temperature Sensor

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

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.


More related articles

How Long Does a Throttle Return Spring Last?
Not all vehicles on the road feature an electronic throttle control (ETC), which is also called drive-by-wire. For vehicles that don't offer this system, they have a throttle cable instead that...
P0121 OBD-II Trouble Code: TPS "A" Circuit Range Performance Problem
P0121 code definition Throttle Pedal Position Sensor/Switch (TPS) A Circuit Range Performance Problem...
How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...

Related questions

Q: will a defective oil pressure sensing system prevent engine starting even if it turns over

Hello. If the oil pressure sensor was bad it would not keep the vehicle from starting. If there is no oil pressure on the gauge when starting it then there is a supply issue. Most of the time this is...

Q: 2004 Mazda Tribubte shut off

This may be a sign of a failing idle air control valve. The idle air control valve monitors the air intake as it is mixed with fuel prior to being injected into the engine. This valve is controlled by the...

Q: Engine occasionally misfires

Hi there, thanks for writing in. In most cases, if you have an error code show up, make the change of components and don't reset to the error code with a digital scanner, the issue will still continue. This is...