The power toothbrush, which has a rotating brushhead movement, includes a housing with a motor mounted therein having an armature which in operation rotates through an arc of predetermined magnitude. The wheelchair also has a frame, which has a lower portion onto which wheels are attached and a substantially vertical portion extending upwardly from the lower portion. A diagnostic level is then assigned to the fuel cell system and at least one recovery driving mode that corresponds to the assigned diagnostic level is performed.