P0110
Low SeverityIntake Air Temperature Sensor Circuit
Fuel System
What Does P0110 Mean?
The IAT sensor circuit has a fault. This sensor measures incoming air temperature for fuel calculations.
Common Fix
Replace IAT sensor
Estimated Cost (DIY)
$10 - $30
Symptoms
- ⚠️Check engine light
- ⚠️Slightly rough running
- ⚠️Poor fuel economy
- ⚠️Hard starting in cold weather
Common Causes
Faulty IAT sensorlikely
Corroded connectorpossible
Wiring issuepossible
Dirty air filter affecting sensorunlikely
How to Diagnose P0110
- 1Inspect IAT sensor connector
- 2Measure sensor resistance vs temperature
- 3Check 5V reference and ground
- 4Replace if out of spec
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Frequently Asked Questions
- Where is the IAT sensor?
- The IAT sensor is usually in the intake duct between the air filter and throttle body, or built into the MAF sensor.
- Can I drive with P0110?
- Yes, the ECM uses a default value. You may notice slightly off fuel economy.