P0112: Intake air temperature sensor circuit low input
You can keep driving. Get it checked when convenient.
Can I drive with P0112?
Yes, you can keep driving. The sensor reports extremely high heat (short circuit), slightly altering fuel mixture without stalling the car.
What does P0112 mean?
P0112 stands for Intake Air Temperature Circuit Low Input.
Symptoms you may notice
- Check engine light illuminated
- Mild hesitation during cold engine startup
- Slight drop in highway fuel economy in extreme cold or heat
How much does it cost to fix?
Repair costs for code P0112 depend on the specific underlying root cause, ranging from simple DIY checks to component replacement. The table below lists the most common causes and rough price ranges in USD:
- Short to ground in the IAT signal wire
- Internal short in the IAT sensor
- Water intrusion in the sensor connector
- Pinched wire against engine bracket
What to do next
- Unplug the sensor; if the scan tool value drops from dangerously high temperatures to -40°F, replace the sensor.
- Inspect the wiring harness for worn insulation touching the vehicle frame.
- Dry out and spray dielectric grease into the connector.
Last updated: October 2026
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General guidance only, not a professional diagnosis. If the check-engine light is flashing, or the car is running rough, overheating or losing power, stop driving and get help.
About this code
P0112 indicates that the IAT circuit voltage has dropped close to 0 volts, which corresponds to temperatures exceeding 250°F (120°C). The vehicle remains drivable, though cold starts might stumble due to lean fuel delivery. Fixing a pinched wire or replacing the inexpensive plug-in sensor resolves the problem.