P0113: Intake Air Temperature (IAT) Sensor 1 Circuit High
Updated November 12, 2026
The intake air temperature sensor is reporting a voltage that means extremely cold air, colder than is realistic. This is almost always an open circuit: an unplugged sensor, a broken wire or a failed sensor.
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🔧 Want to check this yourself? An OBD2 scanner reads the code; models with live data also show the sensor readings used in the checks below. See code readers and scanners from $24.99 ↓ · Which scanner do I need?
Common causes
- An unplugged or loose IAT sensor (often after an air filter change)
- A broken or corroded wire or connector
- A failed IAT sensor (on many cars it's built into the MAF sensor)
Code meanings can vary slightly by manufacturer. Use these as a starting point and confirm with your vehicle's service information or a mechanic before replacing parts.
Symptoms
- Check engine light
- Sometimes slightly rough running or worse fuel economy
- Often no noticeable symptoms
Is it safe to drive?
Generally safe to drive, but fix it so the engine computer gets accurate data.
How to check it with a scanner
- Plug an OBD2 scanner into the port under the dashboard and read all stored codes and the freeze-frame data (the conditions when the code set).
- Make sure the sensor or MAF connector is plugged in after any air box work.
- In live data, a reading around -40 degrees points to an open circuit.
- Check the wiring and connector before replacing the sensor.
- After a repair, clear the code and drive normally for a few days to confirm it doesn't come back.
A basic code reader shows the code; scanners with live data let you watch sensor readings, which is what you need for most of the checks above. See OBD2 scanners under $100.
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Questions
What does P0113 mean?
P0113 is the generic OBD2 code for "Intake Air Temperature (IAT) Sensor 1 Circuit High." The intake air temperature sensor is reporting a voltage that means extremely cold air, colder than is realistic. This is almost always an open circuit: an unplugged sensor, a broken wire or a failed sensor.
Is it safe to drive with P0113?
Generally safe to drive, but fix it so the engine computer gets accurate data.
How do I check P0113 myself?
Read the code and freeze-frame data with an OBD2 scanner, then: Make sure the sensor or MAF connector is plugged in after any air box work. In live data, a reading around -40 degrees points to an open circuit. Check the wiring and connector before replacing the sensor.
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