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 2007 Mercury Mountaineer, 2007 Mercury Monterey, 2007 Mercury Montego, 2007 Mercury Milan, and 2007 Mercury Mariner. 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
| Description: | Indicates the IAT rationality test has failed. This DTC indicates that the IAT value is higher than a calibrated value and could prevent 1 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 hours). This soak period allows IAT and engine coolant temperature (CHT or ECT) to stabilize and not differ by more than a calibrated value. DTC P0111 is set when: the IAT at engine start exceeds the ECT or CHT by more than a calibrated value, typically 17°C (30°F). |
|||
| Possible Causes: |
|
|||
| 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 | |
| All | refer to PINPOINT TEST DA . | |||