What are some of the 2012 hyundai sonata hesitation problems?

If Your 2012 Hyundai Sonata hesitates, particularly during acceleration, You're typically looking at an issue with Your engine running too lean. This means that there is not enough air in the system, introduced to combust the fuel. There are a variety of reasons for this, but the most common usually involve a sensor of some sort. You may have a faulty O2 sensor, which will typically manifest an OBD2 fault code. Alternatively, the mass airflow sensor may have gone bad, the fuel pump may be in the process of failing, the throttle position sensor may be defective, or Your fuel injectors may be on their way out. Without a more specific diagnosis, it's difficult to determine what Your particular cause may be.