2003 Gmc Check Engine Light On 2003 GMC Envoy Code P0220. The Service Engine Light Came And "Reduced Engine Performance"?

2003 GMC Envoy code P0220. The service engine light came and "Reduced Engine Performance"? - 2003 gmc check engine light on

My wife was driving and the engine light came on duty, do not realize, however, and managerial problems. Scannned and I came with the code P0220 Throttle / Pedal Position Sensor / Sw B CKT malfunction. What should I check or the causes for this code for download? Any help would be appreciated.