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Old 09-26-2009, 12:16 PM   #1
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Default P1111

P1111

Description
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.

Symptoms
You likely won't notice any drivability problems.

Causes

  • IAT intermittently less than -38F (-39C).
Possible Solutions
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