Mechanic to help with a faulty 2012 Nissan Sentra step motor

I am looking for a mechanic to help me with a faulty step motor in my 2012 Nissan Sentra. A took the car to AutoZone and a code of p1778 came up. The car is stalling or hesitating while driving, and I need someone with the skills and experience to diagnose and repair this issue.

Requirements:
- Experience working with Nissan Sentra vehicles
- Knowledge of step motor systems
- Ability to diagnose and repair stalling and hesitation issues

Budget:
- I have a specific budget for this repair

Parts and Tools:
- I do not have access to the necessary parts and tools, but I am willing to purchase what is needed.