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
Related Symptoms
Common Causes
How to Diagnose P0110
- 1Inspect IAT sensor connector
- 2Measure sensor resistance vs temperature
- 3Check 5V reference and ground
- 4Replace if out of spec
OEM Diagnostic Flowchart
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Related Resources
Repair guides, symptom pages, and wiring diagrams related to P0110.
OEM Manual Evidence
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Exact Repair Workflows
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Related Symptoms
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Related Codes
IAT sensor voltage is too low, indicating impossibly high air temperature. Usually a short circuit in the sensor or wiring.
IAT sensor voltage is above maximum range, reading as extremely cold air. Usually an open circuit.
The MAF sensor is reading outside the expected range for current engine conditions. Could be dirty, defective, or have an air leak after the sensor.
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.
Related Repair Guides
If your vehicle has triggered P0110, these DIY repair guides may help: