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Home >> Volkswagen >> 2012 >> Passat TDI SEL >> Repair and Diagnosis >> External Pages >> Different car >> Section 6 (2.0L - Generic Scan Tool - Engine Code: CVCA) >> St Generic Scan Tool >> Diagnosis And Testing >> Diagnostic Procedures >> Outside Air Temperature Sensor -G17-, CHECKING >> Function
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Outside Air Temperature Sensor -G17-, CHECKING: Function

WARNING: This page is about a different car, the 2015 Volkswagen Passat. However, it is still accessible from the selected car via links, so may be relevant.

The ambient or Outside Air Temperature Sensor -G17- is a negative temperature coefficient (NTC) sensor that informs the semiautomatic / automatic temperature control system of outside air temperature. An NTC sensor's resistance decreases as the temperature increases. The computer uses this input along with different in-car temperature sensors to control temperature and blower speed. When there is a problem with this sensor, performance will suffer and the compressor's clutch may not engage.

Special tools and workshop equipment required 

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