2006 Modus light after changing coil pack

Had a check emmissions light 2 weeks ago.



Engine misfire in CYL. 2



Changed coil pack and plugs



Problem solved.



Two weeks later have a check emmissions light.



also 2 fault codes, one for misfire on cyl 2 and another P 0638 (Throttle actuator control range/Performance Bank 1.



Any idea on what it could be .



Engine sounds ok Idling but no power.



Thanks