DTC P0111: Intake Air Temperature (IAT) Sensor 1 Circuit Range/Performance
WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2010 Mercury Mountaineer, 2010 Mercury Milan, 2010 Mercury Mariner, 2010 Mercury Grand Marquis, and 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
DTC 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. |
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| 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 hours). This soak period allows IAT and engine coolant temperature (ECT) or cylinder head temperature (CHT) to stabilize and not differ by more than a calibrated value. DTC P0111 sets when the IAT at engine start exceeds the ECT or CHT by more than a calibrated value, typically 17°C (30°F). |
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| Diagnostic Aids: | Make sure the IAT and the CHT or ECT are similar when the engine is cold. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| Flex GTDI, MKS 3.5L, MKT 3.5L, Taurus GTDI |
GO to PINPOINT TEST EA . | ||
| All others | GO to PINPOINT TEST DA . | ||