2001 Subaru Impreza Owner's Manual - Page 190

NOTE Immediately after a disconnected battery is reconnected or ATF (automatic transmission fluid) is replaced, you may feel that the automatic transmission operation is somewhat unusual. This results from erasure or invalidation of data the on-board computer has collected and stored in memory to allow the transmission to shift at the most appropriate times for the current condition of your vehicle. Optimized shifting will be restored as the vehicle continues to be driven for a while. J Selector lever With the brake pedal depressed, shift while pressing the button in Shift while pressing the button in Release button Shift without pressing the button HS0129 OM-H0149 The selector lever has seven positions. The release button must be pushed to select the "P", "R", or "2" positions. B P (Park) This position is for parking the vehicle and starting the engine. In this position, the transmission is mechanically locked to prevent the vehicle from rolling freely. When you park the vehicle, first set the parking brake fully, then shift into the "P" position. Do not hold the vehicle with only the transmission. A shift interlock function is employed in the automatic transmission system to ensure safe starting of the vehicle. 7-20