Symptom:

WARNING: This page is about a different car, the 2002 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.

Vehicle moves when it is pushed forward or backward with selector lever in P position .

CHECK PARKING COMPONENTS
Check parking components. Refer to COMPONENTS .

Fig 1: Locating Idler Gear & Parking Pawl
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: INSPECTION END
2. NG: Repair or replace damaged parts.