DTC P0111: Intake Air Temperature (IAT) Sensor 1 Circuit Range/Performance
P0111 - INTAKE AIR TEMPERATURE (IAT) SENSOR 1 CIRCUIT RANGE/PERFORMANCE
| For Vehicles With 3.5L GTDI Engine | |||
| Description:
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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Possible Causes:
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| Diagnostic Aids: The IAT sensor is located on the air filter housing. | |||
| For All Others | |||
| Description:
This DTC sets when the IAT value is higher than a calibrated value indicating that the rationality test has failed and could prevent one or more on board diagnostic (OBD) monitors from completing. The 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 |
| Flex 3.5L GTDI, MKS 3.5L, MKT 3.5L, Taurus 3.5L GTDI |
GO to PINPOINT TEST EA . | ||
| F-150 3.5L | GO to PINPOINT TEST DN . | ||
| All others | GO to PINPOINT TEST DA . | ||