Intake Air Temperature Sensor 1 Circuit High Input
Plain-English meaning
The engine control module (ECM) has detected a high voltage signal from the intake air temperature (IAT) sensor, indicating that the sensor is reporting an abnormally high air temperature or an open circuit.
What to check first
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What not to replace yet
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Stop driving when
It is generally safe to continue driving; however, if you notice severe engine performance issues or the check engine light is flashing, stop driving and seek professional assistance.
Related symptoms
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Owner steps
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Likely causes
Faulty or damaged intake air temperature sensor (medium)
Wiring issues such as open or short circuits in the IAT sensor circuit (medium)
Poor electrical connections or corroded connectors (medium)
Intake air temperature sensor disconnected (medium)
ECM malfunction (rare) (medium)
Shop steps
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Follow-up questions
When did the check engine light first come on?
Are there any noticeable changes in engine performance?
Has any recent work been done near the intake air temperature sensor?
Are there any other codes present in the vehicle's system?