I have a 2000 Neon that I have had since it was new that just quit working the other day. I checked all the common stuff and found a PO340 code. I checked all the wires and connections and all looked OK. I changed the Cam Shaft Position Sensor to no avail and then I noticed the Powertrain Control Module had been pushed against the transmission housing at some point, deforming the case. I replaced the PCM and it still will not start. I get spark and have gas and have even sprayed either onto the air intake.
What is my next best thing to check?

 

that code relates to the cam position sensor circuit. I know u put a new sensor but was the wiring ok? did you have 5v, good ground, any lime disease?

how did the pcm get pushed back u hit something with this car?
lol I just looked and theres about 8 inches between the two, your front end is pushed back quite a bit to make the pcm contact the trans.

 

Ok I have a good thing for you to check. First you should get the dealer to pull the code rather then read what is on your dash. Why you may ask? Because the code for the Cam Shaft Position Sensor and Crank Position Sensor sometimes exchange. Therefore the code on your dash could read Cam Shaft Position Sensor but when it is pulled down from you computer it may come up Crank Position Sensor. Also realize that behind the Cam Shaft Position Sensor is a magnet. It is a good idea to change that also if you do the Cam Shaft Position Sensor.

I threw the code P0340 at 30,000 miles on my car. I pulled the code from the car and what you know the code was actually different when we pulled it then what was on the dash board. I would check or replace the Crank Position Sensor. Also do what is said above to see if you are getting 5v to the sensor.

 

I have 9 volts on one lead and 5 on the other with a good ground on the black.
My daughter used this car while she was in college and did have the front pused back on a number of occasions. I would hook onto it with a line and pull it out but not to 8 inches. There is about 2 inches now.
I am about 40 miles away from a dealer and the car does not run. Can I get a code reader from a parts store and check that code?
What are the chances of the Timing Belt being the problem even though I am not getting a po016 code. If the 340 code could be wrong, the 016 code could be wrong...maybe

 

What are the chances of the Timing Belt being the problem I do not get the PO016 code for that but if the codes can be wrong, it might be. There is about 40K miles on this belt.
I get 5 volts on one cam lead and 9 volts on the other with a good ground and no corrosion.

 

One person gave you a very good answer-- crank sensor. Neon's are notorious for weird crank sensor problems. My first encounter with this was quite frustrating. I had spark, fuel but it wouldn't start. I used a dual trace scope and found odd signal from the crank sensor. When I removed crank sensor plug, it was full of oil. so the sensor was leaking. I put in a new sensor and that fixed the car.

 

Book version of the symptoms to know you have a bad crank sensor.


Symptoms of Problems

 

I have a 2000 Neon with 16 valves that has a broken Timing Belt. In addition to replacing it, do I need to pull the head and look for any damaged valves?

 

you got about a 90+% chance of bent valves.

you can put the new belt on and do a quick compression test. that'll tell you if the valves are bent

 

Oh man you broke your timing belt. No wondering you threw the P0340 code. Glad to hear you found out what was wrong with it.

Well I am not sure about 2000 Neons but out SRT-4s are non-interference engines which means your piston to valves wont touch even if you snap your timing belt while driving.