My Dodge Grand Caravan 2004 I have changed ECM, CRANSHAFT CAMSHAFT SENSOR but there is intermittent voltage to starting coil and sometimes it starts and blows the coil now is not starting at all

P0340 DODGE - Camshaft Position Sensor Circuit Bank 1 Sensor 1

Possible causes- Camshaft Position Sensor harness is open or shorted
- Camshaft Position Sensor circuit poor electrical connection
- Faulty Camshaft Position Sensor
- Faulty starter motor
- Starting system circuit
- Dead (Weak) battery Tech notes Sometimes and in some models, low battery voltage or a weak starter can can trigger a Camshaft Position Sensor code, also a loose worn cam belt can cause this code. Has the belt ever been replaced?.

If you drove it to the dealer, the crankshaft sensor was not bad... Find another repair shop.

This means NO CAM SIGNAL AT (PCM)
Possible Causes=
Camshaft Position Sensor (most likley)
MP signal circuit shorted to voltage
Tone wheel/pulse ring damaged
Sensor ground circuit open
5 volt supply circuit open
Irregular LAB scope pattern of CMP signal
Wiring harness intermittent problem
Stay signal from crankshaft position sensor

SOUND LIKE THE AUTO SHUT DOWN RELAY.IT CONTROLS BATTERY VOLTAGE TO THE COILS.

All ways, the camshaft position sensor signal sent to the ECM is intermittent

The Camshaft Position Sensor is an electronic device used in an engine to record the rate at which the camshaft is spinning. This information is used by the Powertrain Control Module (PCM) or Electronic Control Module(ECM) to control ignition and fuel injection. The camshaft position sensor senses the retraction of camshaft (intake) to identify a particular cylinder. The camshaft position sensor senses the piston position. The sensor system consists of a rotating part, typically a disc, as well as a static part, the actual sensor.

When the engine is running, the high and low parts of the teeth cause the gap with the sensor to change. The changing gap causes the magnetic field near the sensor to change. The change in the magnetic field cause the voltage from the sensor to change.

When the crankshaft position sensor (POS) system becomes inoperative, the camshaft position sensor provides various controls of engine parts instead, utilizing timing of cylinder identification signals.

Check thos DTC diagnostic and possible solutions about P0344 - Camshaft Position Sensor Circuit Intermittent

Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/Loss of Power
- Engine Stall

Possible causes
- Harness or connectors (The sensor circuit is open or shorted)
- Camshaft position sensor may be faulty
- Camshaft (Intake) may be damage
- Starter motor may be faulty
- Starting system circuit
- Dead (Weak) battery

Possible solution
- Charge battery
- Repair harness or connector
- Replaced Camshaft Position Sensor.
Tech notes
- Sometimes and in some models, low battery voltage or a weak starter can can trigger a Camshaft Position Sensor code.


Hope this helps.

11 - Timing belt skipped 1 tooth or more from initial learned value, Intermittent loss of either camshaft or crankshaft position sensor, No crank reference signal detected during engine cranking.

13 - No change in MAP from start to run.

24 - Throttle Position sensor out of range.

32 - EGR system failure.

52 - Fuel system too rich.

camshaft position sensor high input, camshaft position position sensor intermittent, ignition coil circuit. Check your circuits to these locations. also check for cracks and breaks.

If it where me I would start considering the only common part between all these effected systems. The ECM although the dealer should be able to say for sure. They have a machine that actually replaces the ECM and can simulate all the sensors. I had to say it but you may need to take it to a dealer for complete diagnostics and repair since the machine is a dealer only type machine.

You may need the computer changed,this is a common chrysler problem.
one from the junk yard will do just fine, make sure the numbers match.

No spark indicates either a coil,distributor,or crank position sensor problem.