Intake Air Temperature Sensor Circuit High/Intermittent
2016-2020 Kia Optima 2.4L I4
Description
The PCM has detected an intermittent high-voltage condition on the Intake Air Temperature sensor circuit. The signal intermittently spikes above normal range, indicating a possible open circuit condition.
Symptoms
- Check Engine Light
- Engine may run slightly rich during fault
- Minor performance variation
Common Causes
- Loose IAT sensor connector causing open circuit
- Damaged IAT sensor wiring
- Corroded connector pins
- Failing IAT sensor with increasing resistance
Diagnostic Steps
- Monitor IAT voltage on scan tool and wiggle test connections
- Inspect connector for loose or spread pins
- Test IAT sensor resistance and compare to specification
- Check wiring for high-resistance connections
Repair Notes
Repair connector or wiring; replace the IAT sensor if resistance is out of specification.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1112 on Other Vehicles
Common Questions
What does code P1112 mean on a 2016-2020 Kia Optima?
P1112 stands for "Intake Air Temperature Sensor Circuit High/Intermittent". The PCM has detected an intermittent high-voltage condition on the Intake Air Temperature sensor circuit. The signal intermittently spikes above normal range, indicating a possible open circuit condition.
What are the symptoms of P1112 on a Kia Optima?
Common symptoms of P1112 include: Check Engine Light, Engine may run slightly rich during fault, Minor performance variation.
What causes P1112 on a 2016-2020 Kia Optima?
Common causes of P1112 include: Loose IAT sensor connector causing open circuit, Damaged IAT sensor wiring, Corroded connector pins, Failing IAT sensor with increasing resistance.