Not necessary. The relearn will take place on its own but the Engine Computer will also lose the short and long-term fuel trims from memory. Those will also update while driving but normally that happens so quickly that you won't notice much of a power loss.
If the power doesn't seem normal, first check for diagnostic fault codes. Not all codes cause the Check Engine light to turn on.
Wednesday, April 27th, 2011 AT 7:14 AM