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Intake Air Temperature Sensor Replacement
 
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Pelican Technical Article:

Intake Air Temperature Sensor Replacement

Steve Vernon

Time:

30 minutes30 mins

Tab:

$10

Talent:

*

Tools:

T30 Torx

Applicable Models:

VW GTI (2006-09)

Parts Required:

New Sensor

Hot Tip:

Don't get grease on the sensor wires

Performance Gain:

Car runs like normal again

Complementary Modification:

Replace MAF Sensor

If you are starting to have trouble with your idle there is a good chance the Intake Air Temperature Sensor is starting to go bad. If you are getting an error code indicating the IAT then it is time to clean or replace the sensor. The sensor is located on the top of the throttle body at the front center of the engine. It is possible to clean the sensor with MAF cleaner or simply replace it. The sensor is not expensive and many people just swap in a new one rather than buy a can of MAF cleaner and hope it does the trick.

If you do not have an aftermarket air induction system that eliminates the engine cover (red arrow) you will need to remove the cover.
Figure 1

If you do not have an aftermarket air induction system that eliminates the engine cover (red arrow) you will need to remove the cover. Please see our article on engine cover removal for additional assistance.

Begin by locating the intake air temperature sensor (red arrow) on the top of the throttle body.
Figure 2

Begin by locating the intake air temperature sensor (red arrow) on the top of the throttle body.

Due to the location of the clip they get very brittle over time.
Figure 3

Due to the location of the clip they get very brittle over time. Carefully squeeze in the tap on the rear of the clip (red arrow) and pulling straight off.

Disconnect the wiring harness (red arrow) from the sensor (yellow arrow).
Figure 4

Disconnect the wiring harness (red arrow) from the sensor (yellow arrow).

Next use a T30 Torx and unscrew the single screw (red arrow) holding the sensor to the intake manifold and pull the sensor straight out.
Figure 5

Next use a T30 Torx and unscrew the single screw (red arrow) holding the sensor to the intake manifold and pull the sensor straight out.

You can now attempt to clean the sensor or replace it with a new one.
Figure 6

You can now attempt to clean the sensor or replace it with a new one. The sensors develop an amber looking coating on them and over time with can harden to a glass like coating. Carefully use the MAF cleaner and some Q-tips to clean both wires. If you break any of the wires you will need to replace the sensor. Installation is the reverse of removal.

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Page last updated: Mon 12/5/2016 02:35:47 AM