Pt cruiser won't start

The code tells you where the problem is not what to replace , you still have to figure out what's causing the problem , Cranking is turning over , starting is something else .

What codes are you getting? Circuit high/low or circuit malfunction

Make sure the battery has a full charge and connections all good. Have a helper crank it while you check for spark at the plugs. If spark everywhere, use a gage and check proper fuel pressure and fuel injector pulse. At ignition coil and fuel injectors, dark green wire with orange tracer is voltage, engine cranking, use a test light to check for voltage. If no voltage, that voltage comes from asd relay. Usually Chrysler has to see both the cam and crank signals or the computer won't ground the relay, which means no voltage to some of those systems, no start. I might be barking up the tree. Just something to check.

Mine did that and it was the timing belt.