You don't need the 300 dollar scan tool to figure out whats wrong with the car. I used to troubleshoot my neon all the time and never used the scanner, as far as having the wrong begining of code strand thing that kinda stuff happens, I haven't worked on the car in a little over a year. Plus if it gave the code for the timing belt it wouldn't nessicarily be any senor at all. Did you take off the timing cover and make sure it didn't jump a tooth? it could have or if the car has allot of miles its possible the belt just stretched and you need a new one... its recommended that they are changd every 60000 miles or something like that. Did you disconnect the battery for 10 minutes after you did all the work to clear the codes? I mean it sounds stupid but that might do it. Also the no cam sensor signal at PCM sounds odd if you had it replaced.... I would check all the wires and everything leading from the sensor to the PCM chrysler wiring is crappy to say the least if your old Cam position sensor shorted out it could have toasted a wire. If all the wires looks good make sure its hooked up right. If you have a multi-meter you can just see if its sending a signal by seeing how many volts are going through it. You don't need to have the car running to do this I don't thing, just have the car keyed on. Check it right at the sensor and then right at the PCM. If everything looks good maybe you got a bad sensor it happens once in a while... I would say try all of that before you go out and buy an OBD2 scanner..