P0110
IAT Sensor Circuit Malfunction
low
i Description
The Intake Air Temperature (IAT) sensor circuit has a malfunction. The IAT sensor measures the temperature of air entering the engine, which the ECU uses to fine-tune fuel delivery and spark timing.
? Common Causes
- Faulty IAT sensor
- Damaged wiring or connector
- Poor ground connection
- Sensor contaminated with oil or debris
! Symptoms
- Check engine light
- Slight decrease in fuel economy
- Minor performance change
- Hard starting in extreme temperatures
# Diagnostic Steps
- Inspect IAT sensor connector
- Test IAT sensor resistance (should change with temperature)
- Check wiring continuity
- Compare IAT reading to ambient temperature at cold start
⚙ Typical Fix
Replace the IAT sensor or repair its wiring.
Parts Needed
IAT sensor
Estimated Cost
$30-$150
↔ Related Codes
Q Frequently Asked Questions
Yes, this is a low-severity code. The ECU will use a default temperature value. You may notice slightly worse fuel economy.
Absolutely. The IAT sensor is usually a simple two-wire sensor in the intake duct. Replacement takes 10 minutes.
IAT sensors cost $15-$50. Mechanic labour is $50-$80 for this easy job.
☞ Learn More
- Check Engine Light — What it means, is it safe to drive & how to fix
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