Chrysler
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    IAT Sensor Circuit High Input Conditions
Cause:
    Engine running, then the test started and the PCM detected an IAT sensor input of over 4.9v for 3 seconds.

Ford
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    IAT Sensor High Conditions
Cause:
    Key on or engine running, then the PCM detected an IAT sensor signal of more than 4.60v (-46°F)

Generic
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    Intake Air Temperature Sensor 1 Circuit High

GM
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    IAT Sensor Circuit High Input Conditions
Cause:
    DTC P0101, P0102, P011 7 and P0118 not set, engine speed over 500 rpm for 20 seconds, VSS input over 7 mph for 5 seconds, ECT sensor input 32°F or more, IAT sensor input less than 81°F, VSS input under 50 mph, MAF sensor input 60 g/sec or less, then the PCM detected that the IAT sensor input was -35°F or less.

Nissan
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    Intake air temperature (IAT) sensor - voltage high
Cause:
    Wiring, IAT sensor, ECM