2006 Nissan Altima Owner's Manual - Page 181

If the key is turned to the OFF or ACC position for any reason while the vehicle is in N (Neutral), or any D (Drive) position, the shift selector lever cannot be moved to P (Park). Additionally, the key cannot be turned to the LOCK position and be removed from the ignition switch. If this occurs, perform the following steps: 1. Apply the parking brake when the vehicle is stopped. 2. Turn the key to the ON position. 3. Depress the foot brake pedal. 4. Move the shift selector lever to P (Park) or N (Neutral) to restart the vehicle (P is preferred). Move the shift selector lever to P (Park) to park the vehicle and turn the ignition key to the LOCK position to remove the key. P (Park): Use this selector position when the vehicle is parked or when starting the engine. Make sure the vehicle is completely stopped. The brake pedal must be depressed to move the selector lever from the N (Neutral) or any drive position to P (Park). Apply the parking brake. When parking on a hill, apply the parking brake first, then shift the selector lever into the P (Park) position. R (Reverse): CAUTION Use this position only when the vehicle is completely stopped. Use this position to back up. Make sure the vehicle is completely stopped before selecting the R (Reverse) position. The brake pedal must be depressed to move the selector lever from P (Park), N (Neutral) or any drive position to R (Reverse). N (Neutral): Neither forward nor reverse gear is engaged. The engine can be started in this position. You may shift to N (Neutral) and restart a stalled engine while the vehicle is moving. D (Drive): Use this position for all normal forward driving. 3 (Third gear): Use this position for driving up and down long slopes where engine braking would be advantageous. 2 (Second gear): Use this position for hill climbing or engine braking on downhill grades. Do not shift into the 2 position at speeds above 62 MPH (100 km/h). Do not exceed 62 MPH (100 km/h) in the 2 position. 1 (Low gear): Use this position when climbing steep hills slowly or slow driving through deep snow, sand or mud, or for maximum engine braking on steep downhill grades. Do not shift into the 1 position at speeds above 34 MPH (55 km/h). Do not exceed 34 MPH (55 km/h) in the 1 position. Starting and driving 5-9