Code P1111
Le Mans Master
Joined: Jul 2000
Posts: 7,758
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From: Fort Worth Texas
Cruise-In II Veteran
Cruise-In III Veteran
Re: Code P1111 (shftn6)
The intake air temperature (IAT) sensor contains a semiconductor device which changes resistance based on temperature (a thermistor). The IAT sensor mounts in the air intake passage of the engine air induction system. The IAT sensor has a signal circuit and a ground circuit. The PCM applies a voltage (about 5 volts) on the signal circuit to the sensor. The PCM monitors changes in this voltage caused by changes in the resistance of the sensor in order to determine the intake air temperature.
When the PCM senses a signal voltage higher than the normal operating range of the sensor, this DTC sets.
Conditions for Running the DTC:
DTCs P0102, P0103, P0117, P0118, P0500, P0502, P0503 are not set.
The engine is operating longer than 100 seconds.
The ECT is greater than 0°C (32°F).
The vehicle speed is less than 11 km/h (7 mph).
The Mass Air Flow is less than 15 grams per second.
Conditions for Setting the DTC:
Intake Air Temperature is less than -35°C (-31°F).
The intermittent condition exists for a total of 1.0 second during a 20.0 second time period.
When the PCM senses a signal voltage higher than the normal operating range of the sensor, this DTC sets.
Conditions for Running the DTC:
DTCs P0102, P0103, P0117, P0118, P0500, P0502, P0503 are not set.
The engine is operating longer than 100 seconds.
The ECT is greater than 0°C (32°F).
The vehicle speed is less than 11 km/h (7 mph).
The Mass Air Flow is less than 15 grams per second.
Conditions for Setting the DTC:
Intake Air Temperature is less than -35°C (-31°F).
The intermittent condition exists for a total of 1.0 second during a 20.0 second time period.
