P0110 Code: Intake Air Temperature Sensor 1 Circuit
🟢 Low severity · drivable
The engine will usually keep running, but fuel economy may drop while the computer guesses the air temperature.
What P0110 means
The intake air temperature (IAT) sensor measures the temperature of the air entering the engine. This code means the sensor circuit is not working. The computer may use a default temperature instead, which can hurt fuel economy and driveability.
Symptoms
- Check engine light on
- Poor fuel economy
- Hard starting in cold weather
- Rough idle
Common causes
- most common: Faulty IAT sensor
- common: Open or shorted wiring in the sensor circuit
- common: Corroded or loose connector
- less common: Contaminated sensor
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Replace the IAT sensor | Yes | $20–80 |
| Repair the wiring | Yes | $20–80 |
| Clean the connector | Yes | $0–20 |
| Clean the sensor | Yes | $0–10 |
Frequently asked questions
Can I drive with P0110?
Yes, the engine will usually keep running, but fuel economy may drop while the computer guesses the air temperature.
Where is the IAT sensor?
It is usually in the air intake tube or in the air filter housing.
Is the IAT sensor expensive to replace?
No. The part usually costs $20 to $80 and is easy to reach on most vehicles.
Related codes
P0111
P0111 Code: Intake Air Temperature Sensor 1 Range/Performance
P0112P0112 Code: Intake Air Temperature Sensor 1 Circuit Low
P0113P0113 Code: Intake Air Temperature (IAT) Sensor Circuit High Input
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.