P1112low severityPowertrain
Intake Air Temperature Sensor Circuit High/Intermittent
on 2012 Hyundai Tucson 2.0L I4 · AWD
What this code means
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.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1