The 2022 Kia Sportage uses an Intake Air Temperature (IAT) sensor to measure the temperature of air entering the engine. This data helps the ECU adjust fuel delivery and ignition timing for optimal performance. When P0110 appears, indicating an IAT circuit malfunction, the engine may run rough or have performance issues.
What P0110 Means
P0110 is a general circuit malfunction code for the IAT sensor. Like other "circuit malfunction" codes, it indicates the ECU detected a problem but couldn't determine if it was high, low, or a specific issue. This often points to wiring or connector problems rather than sensor failure.
IAT Sensor Function
The IAT sensor is a thermistor that changes resistance based on temperature. Cold air is denser and requires more fuel; hot air is less dense and requires less fuel. The ECU uses this data to calculate proper air/fuel ratios. The 2022 Sportage's turbocharged 2.5L engine relies on accurate IAT readings for boost and fuel calculations.
Common Causes of P0110
Wiring issues are the most common cause. The IAT connector may be loose, corroded, or damaged. Wiring can chafe against engine components, especially near the hot intake tract. Inspect the connector and trace wiring for visible damage.
A failed IAT sensor is possible but less common than connection issues. The thermistor element can fail open or short, preventing proper temperature measurement.
Some vehicles integrate the IAT sensor into the MAF sensor housing. If this is the case, both sensors share wiring and connectors—issues with one may affect the other.
Diagnostic Approach
Check the IAT connector for security, corrosion, or damage. Monitor IAT readings with a scan tool—they should reflect actual ambient temperature when the engine is cold and rise somewhat during operation. Compare readings to ambient temperature and other temperature sensors.