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.
Circuit Description
Intake Air Temperature (IAT) sensor is a thermistor that controls a monitored signal voltage to PCM. When air is cool, sensor resistance will be high and PCM will sense a high voltage signal. When air is warm, sensor resistance will be low and PCM will sense a low voltage signal.
DTC will set when the following conditions are present:
- Engine coolant temperature is less than 109°F (42.5°C).
- Intake air temperature is greater than or equal to 304°F (151°C).
- Conditions are met for 2 seconds.
NO RELATED
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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.