IAT SENSOR CIRCUIT INTERMITTENT HIGH VOLTAGE
Intake Air Temperature (IAT) sensor is a thermistor. PCM
applies and reads a 5-volt reference signal to sensor. When air is
cold, sensor resistance is high and PCM will measure a high signal
voltage. If air is warm, sensor resistance is low causing PCM to
measure low voltage.
You likely won't notice any drivability problems.
- IAT intermittently less than -38F (-39C).