What does it mean when your check enine light is on and the security light is flashing and your car wont start?

Do you mean ENGINE LIGHT?

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Anthony

Your anti theft system has engaged. You can usually reset it by locking and unlocking the drivers door with the key. Unfortunately I am not a Chrysler expert, so am no help other than that.

If your security light is flashing leave the key in the on pos for 10 min and the light should stop flashing . when it does your car will start

Usually the flashing security light means the computer is not finding the right code in the key chip.
Is the key you are using programmed to the vehicle ?

Please check that the key is paired with the vehicle's security system. If you have a spare key, then please try that too.
Is there a flashing key symbol warning light on the dash when attempting to start? This could mean that there is a pairing issue, and that the security system needs reprograming.

Yes the security light will cause the truck to stall. Check out this link for info and solutions. This is definitely a security problem. http://vatspasslockpasskeysecurityhelp.yolasite.com/.

The steering wheel will not "lock" until you turn it about 45 degrees from center...this is normal. If your security light is flashing, there is a problem with your security system that is keeping you from starting the engine. Try this: Set the parking brake. Turn the ignition to the "RUN" position and wait about 10 minutes for the security light to stop flashing. When the light stops flashing, crank the engine without turning the key to the off position. If it starts, take the vehicle to get the security system checked. If it doesn't start, tow it. You probably need a new PassKey sensor.

try disconnecting the battery should reset the system

sounds like you need a new ignition switch the pass lock is screwing up common.

It's the passlock system that is acting up.. I have the same problem at the moment but mines came from disconnecting my stereo system, the power wire sparked and toasted one of the computers. now the important thing is if the security light is flashing or is steady on.. if it is flashing you just have ti reset the security by turning the key to the on posistiona and wait about 10 - 15minutes and let the pass lock reset.. is it is steady on (no flashin):

a steady light means that you could have a Class 2 data circuit problem. It indicates that your "passward" from your key in the "passlock" is not getting sent to the (Vehicles Thieft Deterrent) thats inside your Vehicles Control Module. This shuts down your fuel log or injectors stopping the engine from starting. The vehicle might start, but then stalls after 4 sec or so.
It's like the vehicle thinks it's been stollen. That's too bad, if your light was flashing "and" your cycles were correct the car would have re-leaned the passward and started.
A problem could mean...but not limited to a open,shorted or grounded circuit....or a loose or open connector between these comunicating systems: SIP/PCM/VTD/VCM and perhaps the EBCM.
Security Insturment Panal
PCM - Passlock Control Module
VTD - Vehicle Theift Deterrent
VCM- Vehicle Control Module
EBCM - E Brake Control Module

you may have to have the dealer check and replace / but instead of passlock system you may have the Passkey 3+ system