by using hand
If it's the lock itself and not the latch, you might as well replace the lock.
is an idea only-try to remove the back seat and crowl in to the trunk and see if you can turn the lock manualy
How to fix vapor lock on a 2000 Ford Mustang
The cord that provides tension is not in place. Once you get the hood up, and the grill off, there is a ball attached to the cord; it fits into the bottom half of the lock mechanism and should then provide tension to get the lock to pop.
How do you fix the cable in side of the back doors of a 2000 ford f150
Crank position sensor, to the right of your oil filter
To fix a trunk latch that is stuck open, the teeth on the lock may have to be adjusted so the trunk will close. It is also possible that the cable for the trunk latch is broken. To fix the gas cap door latch may require a little bending and adjusting with a pair of pliers.
Shoukld be the fuse for parking/tail, and dash lights
Bring it to your local locksmith
Read your manual. There is a switch in the glove box to disable the trunk release button on the dash. you lock the glove box with the regular key. When you give someone the valet key they can not get in the trunk.
Remove the rear seat to access the trunk and repair the lock assembly.
The diagnostic code P1538 for a 2000 VW Jetta means the engine shut off solenoid is open or short to ground. A common cause of this diagnostic code appearing is a lose wire to the fuel cutoff solenoid.