1996 Dodge Neon Wont Start

Tiny
WHITEHONKY
  • MEMBER
  • 1996 DODGE NEON
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 63 MILES
I have a 1996 Dodge Neon. My scantool gives the error "P0340 - Camshaft Position Sensor Circuit Bank 1 Sensor 1".

The car DOES NOT START. It has NO SPARK at all. I have replaced the Camshaft Position Sensor, Crankshaft Position Sensor, PCM (New and Programmed), CAM Trigger Magnet, Spark Plugs, and Coil. I had to rewire the plugs for everything, and I am not sure if this is my problem. The old plugs were round and the new plugs were square, so they had to be replaced. I have 8 volts in the center wire on the Camshaft
Position Sensor, 5 volts on the far right wire (Green?) And the coil center wire lights up on my test light when I turn the key on and off.

The car just turns over and never sparks or fires. I put a tester on the spark plug wire and it didn't light up. I have switched the working horn relay with the ignition relay and the relays work fine. I have erased the code several times from the PCM and I have removed the PCM wires while the car ignition was on and waited a couple minuets then plugged them back in with the ignition on, as a mechanic told me to do. - Still same thing, over and over, same error code.

I can not do a "Live Feed" test, because the car WILL NOT START.
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Friday, August 14th, 2015 AT 10:25 AM

7 Replies

Tiny
RIVERMIKERAT
  • MEMBER
Can you check to see if the primary ignition circuit is opening and closing when you crank the engine over? Since you keep getting the P0340 code, my guess is the Cam sensor needs to be adjusted. If the air gap is too big or too small, it won't trigger the circuit.
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Friday, August 14th, 2015 AT 11:01 AM
Tiny
WHITEHONKY
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How do I test the ignition circuit and how do I adjust the CAM Sensor? I searched youtube. Com but didn't find my vehicle.
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Friday, August 14th, 2015 AT 11:32 AM
Tiny
RIVERMIKERAT
  • MEMBER
1. Turn ignition off. Disconnect Camshaft Position (CMP) sensor connector. CMP sensor is located on end of cylinder head. Go to next step.
2. Turn ignition on. Using scan tool in voltmeter mode, check voltage on CMP sensor connector (harness side) 8-volt supply circuit. See CMP SENSOR CONNECTOR WIRE IDENTIFICATION table.
CMP SENSOR CONNECTOR WIRE IDENTIFICATION

Application Wire Color

CMP 8-Volt Supply Circuit Orange
CMP Signal Circuit Tan/Yellow
CMP Ground Circuit Black/Light Blue

3. If voltage is more than 7 volts, go to next step. If voltage is 7 volts or less, repair 8-volt supply circuit. See CMP SENSOR CONNECTOR WIRE IDENTIFICATION table.
4. Turn ignition off. Connect a jumper wire to CMP sensor signal circuit. See CMP SENSOR CONNECTOR WIRE IDENTIFICATION table. Turn ignition on. Using scan tool, note CMP sensor signal state. While observing scan tool display, tap other end of jumper wire to CMP sensor ground circuit. See CMP SENSOR CONNECTOR WIRE IDENTIFICATION table.
5. If a CMP signal is detected, replace CMP sensor. Perform TEST VER-2A. If a CMP signal is not detected, turn ignition off. Using scan tool in ohmmeter mode, check resistance of CMP sensor ground circuit. See CMP SENSOR CONNECTOR WIRE IDENTIFICATION table. If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open CMP sensor ground circuit. Perform TEST VER-2A.
6. Disconnect Powertrain Control Module (PCM) connectors. Using an external ohmmeter, check resistance of CMP signal circuit between CMP sensor connector and PCM connector. See CMP SENSOR CONNECTOR WIRE IDENTIFICATION table and POWERTRAIN CONTROL MODULE WIRE IDENTIFICATION table. If resistance is less than 5 ohms, go to next step. If resistance is more than 5 ohms, repair open CMP signal circuit. See CMP SENSOR CONNECTOR WIRE IDENTIFICATION table. Perform TEST VER-2A.
PCM TERMINAL 33 WIRE IDENTIFICATION

Application Wire Color

PCM Terminal No. 33 (Camshaft Position Sensor Signal Circuit) Tan/Yellow

7. Using scan tool in ohmmeter mode, check resistance of CMP signal circuit. See CMP SENSOR CONNECTOR WIRE IDENTIFICATION table. If resistance is 5 ohms or less, repair short to ground in CMP signal circuit. See CMP SENSOR CONNECTOR WIRE IDENTIFICATION table. Perform TEST VER-2A. If resistance is more than 5 ohms, replace PCM. Perform TEST VER-2A.
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Friday, August 14th, 2015 AT 11:51 AM
Tiny
WHITEHONKY
  • MEMBER
Okay, how do I repair open CMP sensor ground circuit?
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Friday, August 14th, 2015 AT 11:57 AM
Tiny
RIVERMIKERAT
  • MEMBER
That depends on what has caused the open circuit. It could be a problem in one of the connectors or a broken wire. These are the proverbial "female dog" to find, so I wish you luck. Wiggle connectors. Feel wires carefully. Check the connectors visually. Unfortunately, that's about the only advice I can give you.
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Friday, August 14th, 2015 AT 12:17 PM
Tiny
WHITEHONKY
  • MEMBER
Thank you!
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Friday, August 14th, 2015 AT 12:19 PM
Tiny
RIVERMIKERAT
  • MEMBER
My usual response of "My pleasure" makes me feel sadistic in this case.

Thus: You're welcome.
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Friday, August 14th, 2015 AT 12:48 PM

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