Possible reasons:
* Stuck parking lock mechanism:
* Wear or breakage of mechanism parts
* Contamination or corrosion
* Problems with the gear selector:
* Faulty selector solenoid
* Damaged or bent cable
* Malfunction in the electrical system:
* Faulty gear selector position sensor
* Problems with wiring or connectors
*Low transmission fluid level:
*Lack of fluid leads to hydraulic problems
*Transmission control module (TCM) problems:
*A faulty TCM may affect transmission performance, including parking lock.
Steps to resolve the issue:
1. Check the transmission fluid level: Make sure the fluid level is between the ‘min’ and ‘max’ marks on the dipstick.
2. Clean the battery terminals: Disconnect the battery terminals and clean them from corrosion.
3. Check the condition of the parking lock mechanism: Try manually moving the parking lock lever. If it is jammed, there may be a malfunction in the mechanism.
4. Check the gear selector: Make sure the selector is in the ‘P’ position and that it moves easily between gears.
5. Check the Electrical System: Use a trouble code scanner to check for any codes related to the transmission system. Check wiring and connectors for damage.
6. Reset TCM: Disconnect the battery terminals for 15 minutes to reset the TCM.
7. Consult a mechanic: If the above steps do not resolve the problem, contact a qualified mechanic for further diagnosis and repair.