Intake Air Temperature Sensor 2 Circuit Range/Performance
Common Symptoms
- Check engine light illuminated
- Rough idle or hesitation during acceleration
- Poor fuel economy
- Engine may run rich or lean intermittently
- Black smoke from exhaust under load
- Difficulty starting in cold weather
Most Likely Root Causes
- Contaminated or damaged intake air temperature sensor 2
- Corroded or loose wiring connections at IAT sensor 2
- Intake air leaks affecting sensor reading accuracy
- Failed or failing IAT sensor 2 element
- ECM software calibration issue
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Component Location
Intake air temperature sensor 2 is typically located in the air intake system downstream of the primary IAT sensor, often in the intake manifold or charge air cooler outlet.
Manufacturer Notes
Vehicles with dual IAT sensors typically use sensor 2 for charge air temperature monitoring in turbocharged or supercharged applications.
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