DTC P0111: Intake Air Temperature (IAT) Sensor 1 Circuit Range/Performance
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2011 Mercury Milan, 2011 Mercury Mariner, 2011 Mercury Grand Marquis, 2011 Lincoln Town Car, and 2011 Lincoln Navigator L. However, it is still accessible from the selected car via links, so may be relevant.
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) 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 - 8 hours). This soak period allows IAT and other temperature sensors to stabilize and not differ by greater than a calibrated value. DTC P0111 sets when the IAT at engine start exceeds the other temperature sensors by greater than a calibrated value, typically 17°C (30°F). |
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| Possible Causes: |
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| Diagnostic Aids: | Make sure the IAT reading and the other temperature sensor readings are similar when the engine is cold. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| F-150 3.5L, Flex 3.5L GTDI, MKS 3.5L, MKT 3.5L, Taurus 3.5L GTDI |
GO to PINPOINT TEST EA . | ||
| All others | GO to PINPOINT TEST DA . | ||