I have 2002 pt . I have no problem with it, started it and put in gear, went to pull out and it shut off, now it won,t start back up, put new battery in, new switch, still nothing,

yes, tacho also runs off that sensor.
I trust you disconnected the battery before you pulled the starter?
If not you may have fried a module or 2 and possibly even the computer.

Sounds like a bad battery cable or connection somewhere.

DOES YOUR CAR CRANKS OR IS COMPLETELY DEAD ONLY LIGHTS? IF IT CRANKS AND DOESN'T ENGINE RUN THEN IT IS EITHER THE ALARM ( IMMOBILIZER )SYSTEM ACTIVATED,OR THE IGNITION KEY FAILURE. IF YOU HAVE A SPARE IGNITION KEY TRY AGAIN ( THE KEY TO BE THE ONE WITH CHIP INSIDE ).IF IT IS COMPLETELY DEAD THEN YOU NEED THE ASSISTANCE OF A QUALIFIED PERSON TO DIS ACTIVATE THE ALARM AND CHECK ALSO YOUR SMART KEY AS WELL .

Did they do a charging system check, check starter and alternator first more details plz and i may be more help.

sounds like the regulator is bad in the altenator. Start vehicle and disconnect negative cable from battery. If it stays running you have another problem. If it stalls out right away the altenator isnt working.

jonboy;
I had the same problem. Check the wire in the terminal on the starter. That terminal is not crimped well enough around the wire.
It is pretty hard to get to, but removing the air cleaner and battery helps. When the PT won't start, have someone get ready to turn the ignition switch to start, reach down the left side of the battery (facing it) And give those 2 red wires (about the size of a lead pencil) hard yank just after your helper turns to start. You'll pull them out of a snap in wire holder, (which you can put back later when it is repaired). This should put the wire to the starter in a bind thus letting it start. You may see some sparks as the contact is made, or if loose enough, pull the wire out of the terminal. If this happens, you found the problem. Hope this solves your problem.
mikeselectric

probably not sounds like either a dead or weak battery or bad connections on the battery posts. first take battery cables loose clean terminals and hook back up hopefully then it will start. or use jumper cables and see if it will jump start. if it jump starts then you no its not starter.if it doesnt jump stsrt then clean posts and cable ends and try again. hope this helps. best of luck

are you making sure you are receiving the correct starter ?? different ones for manual and automatic transmissions.

I would check your wire harness. The starter is close to where you would be working on the radiator. I have not had the pleasure to put one in but i know its a tight squeez in there.