What is an AAT sensor?
Description. The Ambient Air Temperature Sensor measures the temperature outside the passenger compartment and is usually mounted inside or near the front bumper. The sensor provides input to automatic HVAC systems to help control the interior temperature of the automobile.
What are the symptoms of a bad intake air temperature sensor?
A bad intake air temperature (IAT) sensor may cause one or more of the following symptoms: stumbling during acceleration; difficulty starting; rich or lean air-fuel ratio; lean misfire, usually in a cold engine; rough idling when engine is cold; surging when engine is warm; increased fuel consumption; engine stalling or surging
Where is the IAT sensor in the intake manifold?
It can be located on the air cleaner, in the air inlet tube, or in the intake manifold. The IAT sensor is a two-wire sensor with a negative temperature coefficient resistor positioned so that it reads the air entering the engine.
How to check intake air temperature ( IAT )?
To use the scan tool, you need to perform the following steps. Attach the scan tool to the vehicle, and turn on the engine. After turning it on, check for the temperature of the IAT sensor. It should be 10°F above or below the ambient temperature of the vehicle.
What should intake air temp be with engine off?
With the engine off, measure the sensor resistance across its terminals. At about 68 F (20 C), you should get around 37K ohms At about 86 F (30 C), you should get around 24K ohms Plug in the sensor electrical connector.
Is the intake air temperature sensor on all engines?
The Intake Air Temperature (IAT) sensor isn’t present on all engines, thus the P0113 code isn’t on some vehicle code lists; some platforms use the Mass Airflow (MAF) sensor to measure incoming air temperature.
It can be located on the air cleaner, in the air inlet tube, or in the intake manifold. The IAT sensor is a two-wire sensor with a negative temperature coefficient resistor positioned so that it reads the air entering the engine.
How much does it cost to replace an intake temperature sensor?
If your intake temperature sensor is integrated into the MAF sensor, the part cost can increase rapidly. Some MAF sensors cost up to 400$. The replacement of a MAF sensor or intake temperature sensor is often very straightforward and can often be made yourself with basic knowledge.
What should intake air temp be at idle?
At about 68 F (20 C), you should get around 37K ohms At about 86 F (30 C), you should get around 24K ohms Plug in the sensor electrical connector. Start the engine and let it idle for about 20 minutes or until the cooling fan comes on to allow the engine to reach operating temperature.