Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Intake Air Temperature Sensor: Operation
The Intake Air Temperature sensor (IAT) has a Negative Temperature Coefficient (NTC) integrated into the IAT. The IAT alters its electrical resistance in line with the intake air temperature. When the temperature increases, the resistance reading drops. As the temperature drops the resistance increases. The IAT sends this resistance reading to the PCM to help calculate the amount of fuel that is needed. The IAT is integrated into the Mass Air Flow sensor (MAF) and cannot be serviced individually. Refer to REMOVAL for removal and installation of the IAT/MAF.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.