P0639 Fault Code in 2002 Volkswagen Jetta 1.8L Turbo - Can I Replace Throttle Body Actuator Myself?

My daughter was driving her 2002 Volkswagen Jetta 1.8L turbo (122,000 miles) when she made a U-turn and drove over a bumpy surface. Immediately after, she reported the car sputtered and ran roughly, only managing to go about 5 mph before stalling. I inspected underneath the vehicle and found no visible damage. The issue appeared right after the bump, suggesting a possible connection to the throttle body actuator system. The check engine light is showing code P0639 — Throttle Body Actuator Circuit Malfunction. I suspect it's related to the sensor or actuator connected to the gas pedal. However, before towing the car to a mechanic (who would charge hundreds of dollars just to recommend replacing the throttle body actuator), I want to know: is this repair feasible for someone with basic mechanical skills? Or does P063 in this model indicate a more complex issue beyond simply replacing the throttle body actuator?