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Monitors the temperature of the air flowing into the engine
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The sensor can also be used to monitor interior and exterior air temperature as part of the vehicle comfort settings
Troubleshooting:
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Symptoms:
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High nitrogen oxide reading
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Possible causes for failure:
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Damaged switch connectors
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High intake air temperature
Testing:
To test the air temperature sensor it must first be disconnected from the vehicle. It is important that the ignition is turned off when disconnecting.
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Check the sensor for resistance using a multimeter. It is important to check the resistance at different temperatures as this will demonstrate if the sensor is functioning correctly.
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At room temperature resistance should be about 1,500 ohm
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When cold (0°C – freezing point) the resistance should be around 5,000-6,000 ohm. This can be tested by freezing the sensor beforehand
While these are only estimated measurements the most important factor is that the sensors resistance changes with temperature
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If it appears that the sensor is working correctly, check electrical connections for voltage using a multimeter. You should also check all surrounding wires for signs of damage.
Common Fault Codes
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P0095 Intake Air Temperature Sensor 2 Circuit
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P0096 Intake Air Temperature Sensor 2 Circuit Range
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/Performance
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P0097 Intake Air Temperature Sensor 2 Circuit Low
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P0098 Intake Air Temperature Sensor 2 Circuit High
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P0099 Intake Air Temperature Sensor 2 Circuit Intermittent
