Where do I locate the air intake temperature sensor on my 2003 hyundai accent?

Try cleaning the max flow sensor or if it has an air intake temperature sensor. These are located after the air filter box on the large flexible line. Use clean or that is safe for mass sensors available at auto parts store.

its on duct before air filter case

These are usually in or near the intake air filter box or pipe.

Code P0111 refers to the air temperature sensor which is part of the mass air flow sensor located in the intake ducting. It is held in by 2 screws and has a 5 wire terminal connector.

P0103 HYUNDAI - Mass or Volume Air Flow Circuit High InputPossible causes- Dirty mass air flow sensor
- Dirty mass air filter
- Mass air flow sensor harness is open or shorted
- Mass air flow sensor electrical circuit poor connection
- Intake air leaks
- Faulty mass air flow sensor
Tech notesBefore replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner. Reset code and drive vehicle. If the code comes back, it may be necessary to replaced the mass air flow sensor.
P0112 HYUNDAI - Intake Air Temperature Sensor 1 Circuit Low InputPossible causes- Dirty air filter
- Intake air temperature (IAT) sensor harness is open or shorted
- Intake air temperature (IAT) sensor electrical circuit poor connection
- Faulty intake air temperature sensor
When is the code detected?An excessively low voltage from the sensor is sent to ECM.

These parts are located on your air intake. The air intake is a large tube connected to the engine. Be careful not to break them. They are very expensive.

IAT SENSOR IS MOUNTED INSIDE INTAKE AIR HOSE TO THE AIR CLEANER ASSEMBLY. THE MASS AIR FLOW SENSOR IS ALSO MOUNTED TO THE INTAKE AIR HOSE OF THE AIR CLEANER ASSEMBLY. O2 SENSORS LOCATION.YOU HAVE 2 # O2 SENSORS.YOU HAVE ONE THE EXHAUST MANIFOLD.THE OTHER SENSOR LOCATED DOWN AT THE CATALYTIC CONVERTER.

try looking for the temp sensor on the air intake duct

The MAF is mounted in the intake air hose of the air cleaner assembly.
The MAF is mounted in the intake air hose of the air cleaner assembly.
The MAF is mounted in the intake air hose of the air cleaner assembly. On some vehicles this sensor is combined wit the ATS sensor.
The MAF is mounted in the intake air hose of the air cleaner assembly.
This sensor is located in the air intake plenum assembly. It is combined with the IAT sensor.
The MAF is mounted in the intake air hose of the air cleaner assembly. On some vehicles it is combined with the IAT sensor.