|P0111 – Intake Air Temperature (IAT) Sensor 1 Circuit Range/Performance|
|For Vehicles With 3.5L GTDI Engine
Description: The powertrain control module (PCM) continuously monitors this sensor for concerns. This DTC sets when either of the following conditions are present. When the intake air temperature (IAT) parameter identification (PID) does not correlate with the charge air cooler temperature (CAC_T) or the intake air temperature 2 (IAT2) PIDs at ignition ON. When the IAT PID exceeds the maximum calibrated temperature threshold while driving.
Possible Causes: • Slow responding IAT sensor
• Damaged IAT sensor
Diagnostic Aids: The IAT sensor is located on the air filter housing.
|For All Others
Description: Indicates the IAT rationality test has failed. This DTC indicates the IAT value is higher than a calibrated value and could prevent one or more on board diagnostic (OBD) monitors from completing.
The powertrain control module (PCM) runs this logic after an engine OFF and a calibrated soak period (typically 6 – 8 hours). This soak period allows IAT and other temperature sensors to stabilize and not differ by more than a calibrated value. DTC P0111 sets when the IAT at engine start exceeds the other temperature sensors by more than a calibrated value, typically 17°C (30°F).
Possible Causes: • Damaged IAT sensor
Diagnostic Aids: Make sure the IAT reading and the other temperature sensor readings are similar when the engine is cold.