- The shift lock solenoid could be faulty.
- The brake light switch could be defective.
- The transmission control module could be malfunctioning.
- The shift cable or linkage could be damaged or misadjusted.
- The Park Neutral Position (PNP) switch may be faulty.
- Low battery voltage might not provide sufficient power to the shift solenoid.
- A blown fuse or electrical issue might lead to the shifter being disabled.
