Ignition turns but no start

Start with this

If You want to reset the alarm on the Jeep Liberty then You will need to follow these steps. To begin You will want to get into the Jeep and close the doors. Now hold down the control door lock button for 30 seconds. Once You have done this insert the key into the ignition and turn it on. Once it has been turned on You will want to turn it back off, and then back to one again. This will cause the security light to start blinking. While it is doing that turn the Jeep on and the system will be reset. If You wait too long the light will stop and it will not work.

or this

To reset the Jeep Liberty alarm, press the control door-lock button on the keyless entry fob. Open the side door of the cab. Leave all doors closed for around 16 seconds before the Vehicle Security Light on the instrument cluster starts blinking quickly.

How do i reset the Jeep Liberty alarm? - Vehicle History

https://www.vehiclehistory.com > questions > how-do-i-re...
https://www.google.com/search?q=2003+jeep+liberty+sport+4x4+anti+theft+reset

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I had that problem with my 2002 Jeep Liberty and the ignition switch cracked so I had that replaced. I am not sure if that is included in the ignition lock cylinder ...

The ignition switch is not reading the chip in the key, Triggering the anti-theft mode in the ECU.

ignition cylinder? try googleing jeep liberty forums or just google that question

Try starting in neutral. Gear sensor may be heating up and not registering park.

Automatic transmission ? Try moving the gear selector to neutral . park neutral safety switch ,maybe. If placing gear selector in neutral doesn't do anything , looking at a wiring diagram to see what all is involved in the starting system . Do you know what a wiring diagram is ? Free diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model an engine size . Under system click on engine ,then under subsystem click on starting . Click the search button then the blue link .Do you know what a relay starter is , what a totally integrated power module is ? The starter control is controlled by a control module (computer )

This may or may not work depending on the feature install in your vehicle.
To find out, put you Jeep in park, turn the ignition off, now with our starting the engine turn the ignition on,off,on,off,on,off,on this must be completed in 10 seconds. If you have a digital odometer the number should change shortly, the first number will be 12, each number will flash 3 times. The last number will be 55 which means "end of codes". If you don't have a digital odometer it will flash the codes on your check engine light.
If this works write the codes down and I can tell you what they mean. If it doesn't work then as far as I know your vehicle requires a code reader in order to read the codes in your Jeeps computer.
If you want you can take your Jeep to Autozone and they will read the codes for you.

there is a fuse for the panel lights i would start there

ok get in the car, close the door, make sure all doors are closed.... put the key in the ignition, turn the key to on but without starting the car (lights on dash light up only) press and release the key lock button, turn key to off, without removeing the key.. turn to on without starting the car (dash lights up only) press and release the key lock button again, turn the ignition off, without removeing the key then turn back on (lights on dash on only without starting the car, press and release the key lock button , turn off the ignition without removeing the key, ..turn on the ignition once more without starting the car , press and release the key lock button and u should hear the door lock cycle ....leave the key in the ignition ... now press the lock button or unlock button on the other remotes one at a time if u have them.....u should hear the lock cycle indicateing all remotes are programmed.... kind of tricky to explain but you will get it, the sequence of turnin the key in the ignition on and off is only done with that one first key,,, remember after the door lock cyles press the lock or unlock button on the other remote fobs if if any...and ur done..may take u a few trys.. let me know how it worked out.