My 2003 pt cruiser died one day and now it will just crank over but will not start. I changed the cam shaft censor but still doing same thing. What could it be

That camshaft sensor code is likely due to a loss of signal, not a faulty sensor, just from the stalling alone. This engine is equipped with a timing belt, which may have failed, as one guess. Have you checked this? Otherwise, engine performance testing is needed to determine if you have a fuel,, air, spark or exhaust and emissions concern. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops