Intake Air Temperature Sensor
2016 Chevrolet Silverado 1500 · 5.3L V8 EcoTec3 L83
Sensor Type
thermistor
Waveform Type
dc-variable
Location
Integrated into Mass Air Flow sensor housing on air intake tube, passenger side of engine
Pins
2-pin connector
Timebase
1s/div
Voltage Scale
1V/div
Trigger
Not applicable for DC signal
Wiring
Tan wire (IAT signal), Black wire (ground) - both part of MAF connector
Expected Voltage Range
At Idle
1.5V to 3.5V
At Higher RPM
1.2V to 3V
Expected Pattern
Steady DC voltage inversely proportional to intake air temperature, should track ambient temperature when cold
Known-Good Waveform
At ambient temperature of 70°F, expect 2.5-3.0V. Voltage decreases as intake air warms from engine heat or forced induction heating. Signal should be stable with minimal noise. Under hard acceleration or extended idle, voltage may drop to 1.5-2.5V as air warms.
Common Failure Patterns
Constant 4.9-5.0V reading
Cause: Open circuit in IAT sensor element, broken wire in MAF harness
Implausible reading compared to ECT at cold start
Cause: Contaminated sensor element from oil vapors or dirt buildup
Related DTCs: P0111
Diagnostic Tips
IAT is integral to the MAF sensor assembly on L83 engines - cannot be replaced separately. If IAT fails, entire MAF must be replaced. Check for correlation with ECT at cold start - both should read within 10°F of each other when cold soaked overnight.
Related Diagnostic Trouble Codes
P0110P0111P0112P0113P0114
Always confirm waveform data with your vehicle's OEM service manual before diagnosing.
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