How do you program the ignition key to a 2002 pt cruiser

Takes the master key to get it started again. The security gives you 3 tries to get the vehicle started, after the third time, it kills the starter.
2002 Chrysler PT Cruiser Note: You must have two valid keys to add a new key to the system.
1. Insert the first valid key into the ignition switch. Turn the ignition switch to the
ON/RUN position for at least three seconds, but no longer than 15 seconds.
Then, Turn the ignition switch to the LOCK position and remove the first key.
2. Insert the second valid key into the ignition switch. Turn the ignition switch to
the ON/RUN position within 15 seconds. After 10 seconds, a chime will sound.
In addition, the Vehicle Security Light will begin to flash. Turn the ignition switch
to the LOCK position and remove the second key.
3. Insert the new key into the ignition switch. Turn the ignition switch to the
ON/RUN position.within 60 seconds. After 10 seconds, a single chime will
sound. In addition, the Vehicle Security Light will stop flashing. To indicate that
programming is complete, the Vehicle Security Light will turn on again for
seconds and then turn off.
The new key is now programmed. The Remote Keyless Entry transmitter will
also be programmed during this procedure.
Repeat this procedure to program up to eight keys.

if your changing out ignition switch because of lost keys dont ---go to a dealer with your vin and proof of ownership and have key cut --if removing for other reasons with out key you have to drill and break it out and will still stand chance of causing some additional damage

Ignition Switch Actuator Pin Repair Installation Video ...

? 6:54
https://www.youtube.com/watch?v=W5m31g0-3wI
Nov 11, 2010 - Uploaded by DormanProducts
Ignition Switch Actuator Pin Repair Installation Video demonstrated on a PT Cruiser. ... He was not fortunate about it,he just pulled the ignition cylinder half .... toyota corolla ignition lock cylinder and key, switch replacement ...Missing: solara

The ECU is not reading the chip in the key. Replacing the ECU will not solve the problem. It is an input issue(signal to ECU) not an output issue ( signal from ECU). Perform an OBDII scan of stored fault history. Probably an ignition switch problem.

was the neutral safety switch adjusted try moving the shifter slowly threw the gears while turning the key that wilol show you YOU MUST KEEP YOUR FOOT ON THE BRAKE THE TRANS MAY NOT BE IN NEUTRAL WHEN THE SWITCH IS

If the key will not turn it is possibly associated with the steering lock. Try turning the steering wheel back and forth while trying to turn the key. If that does not work, it sounds like you may need a new ignition tumbler.

If you don't have the Panic button then sorry, you can't program yourself, the dealer will have to program it to the RKE (Remote Keyless Entry) module in the vehicle, using their DRB scan tool.

Programming
When
System malfunction. Key added or replaced.
How
NOTE: Two programmed keys necessary. Complete each step within 15 seconds. NOTE: Some models - replacement key can only be programmed using diagnostic equipment.
Obtain all keys to be programmed. Using first programmed key, proceed as follows: Switch ignition ON and OFF within 15 seconds. Using second programmed key, proceed as follows: Switch ignition ON and OFF within 15 seconds. Within 10 seconds: Immobilizer LED flashes. Programming mode activated (acoustic signal will be heard). Proceed as follows: Within 50 seconds: Insert first key to be programmed into ignition switch. Switch ignition ON and OFF. Within 10 seconds: Single acoustic signal will be heard and immobilizer LED stops flashing and illuminates for 3 seconds to indicate correct programming. Repeat complete procedure to program remaining keys. Keys can also be programmed using diagnostic equipment.

Yes, the tumbler is worn, possibly from a heavy key chain or abnormally frequent stop/starts. Ther amy also be a bad connection in the switch connections itself, that may not require a whole new ignition switch.