Poor Fuel Mileage 2006 Hyundai Sonata 2.4 motor

Question edited for clarity add maker and 'year make model engine' in the correct order.
Question moved from Misc, to 'make year' model category.

Apparently it does.

How do I know if my transmission filter needs to be changed?
Grinding noises, transmission leaks, burning smells, noisy idling, and shifting delays are all common symptoms of a clogged filter. If you notice any of these, take your car to a transmission auto repair shop.
May 30, 2022

Clogged Transmission Filter Syptoms

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lifter or weak oil pump

The 2 most common causes ( other than driving habits) for poor fuel mileage are dirty air filter and low air pressure in the tires. Make sure to replace the air filter at least every 15K miles and keep tires properly inflated. After that, you could need new spark plugs, wires, ect. depending on vehicle mileage.

No the transmission fluid on these vehicles are good for over 100,000 miles.

Yes, the timing belt, spark plugs and spark plug wires, fuel filter, O2 sensor/s, a transmission service too.

are you getting fuel to the engine or can you hear the fuel pump kick on when you turn on the key? if not you may have a fuel pump issue

Typically at 100k miles. If the car is used for mostly city driving and in severe climate area's it may be necessary to change them as early as 60k. Make sure to use OEM plugs. Also dont forget to change the spark plug wires, they wear out too!

P1505 and P1507 refer to the Idle Speed Actuator

Most car manufacturers recommend replacing timing belts after 60,000 miles. I have seen cars go 200,000 on a timing belt. But I wouldn't recommend that. Personally, that Max I would go, even if 99% of your driving is highway, is 80,000 miles. I'm not 100% sure about the sonata, but if it is front wheel drive and your replacing the timing belt, think about replacing the water pump at the same time. That is always good practice to remember.

They have had problems with bad fuel pumps.