Intake Air Temperature Sensor
2022 Ford F-150 · 3.5L V6 EcoBoost
Sensor Type
thermistor
Waveform Type
dc-variable
Location
Integrated into the Mass Air Flow (MAF) sensor housing, located between the air filter box and turbocharger inlet on the driver side
Pins
2-pin connector
Timebase
2s/div for monitoring temperature changes
Voltage Scale
1V/div
Trigger
Not applicable for DC signal
Wiring
Tan/Orange wire (signal) and Gray/Red wire (sensor ground), part of 6-pin MAF connector
Expected Voltage Range
At Idle
1.5V to 3.5V
At Higher RPM
0.8V to 2.5V
Expected Pattern
Smooth DC voltage inversely proportional to intake air temperature, negative temperature coefficient
Known-Good Waveform
At ambient temperature (68°F), expect 2.5-3.0V. Under boost or heat soak conditions, voltage will decrease to 1.0-2.0V as intake temps rise. On twin-turbo EcoBoost engines, IAT can increase significantly under sustained load due to turbocharger heating, showing voltage drop to 0.8V or lower at 200°F+ intake temps.
Common Failure Patterns
Voltage stuck at 4.9-5.0V constantly
Cause: Open circuit in IAT portion of MAF sensor or broken wire in harness
Reading -40°F or voltage at 4.9V after MAF cleaning
Cause: Damaged IAT thermistor element from aggressive cleaning or incorrect cleaner used
Related DTCs: P0113
IAT reading matches ECT at all times
Cause: Sensor reading heat from engine rather than intake air, MAF sensor contamination
Related DTCs: P0111
Diagnostic Tips
Never use carburetor cleaner on MAF/IAT sensors; use only MAF-specific cleaner. On EcoBoost engines, compare IAT to ambient temperature at cold start - they should match within 5°F. Check for boost leaks if IAT reads unusually high under load, as this affects turbo efficiency and can trigger limp mode.
Related Diagnostic Trouble Codes
P0110P0111P0112P0113P0114
Always confirm waveform data with your vehicle's OEM service manual before diagnosing.
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