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2nd Gen Dakota 1997 - 2004 Dakota's

Not starting!! Need help!!

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Old 09-23-2013, 11:42 AM
Mr.D Mr.D is offline
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Exclamation Not starting!! Need help!!

I have a Dakota 4.7 that is not starting! Code im geting is P0340. About a week ago it gave me the same problem & wouldnt start. Changed my crank sensor & it fired right up. Drove for about a week & now its doing it again! Went & got another sensor, swapped it out and still nothing. The connection at the sensor seems fine. Could it be the wiring harness?? Im stuck & could really use some help!!
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Old 09-23-2013, 01:06 PM
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P0340 is a camshaft sensor code - "no cam signal at pcm." You don't have fuel sync.

The cam and crank sensors are on the same 5 volt circuit however..
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Old 09-23-2013, 01:10 PM
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If you still have your old sensor try that just in case the one you got was a flop.

Otherwise it could be a wiring issue.

Id break out a multi meter and start testing to see if you're getting power to the Sensor.

Pray that your PCM isnt failing.

Last edited by sxrsil3nt; 09-23-2013 at 01:13 PM..
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Old 09-23-2013, 01:23 PM
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Quote:
Originally Posted by sxrsil3nt View Post
If you still have your old sensor try that just in case the one you got was a flop.

Otherwise it could be a wiring issue.

Id break out a multi meter and start testing to see if you're getting power to the Sensor.

Pray that your PCM isnt failing.
Do you know if there is a prefabed wiring harness that i could purchase for the cam & crank sensor? And im not sure how to test the wires with a multi meter....
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Old 09-23-2013, 01:55 PM
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I doubt there's one... plus it would just be as much work as checking your own.

Basically, Dan has already identified that your crank sensor is on a 5V circuit. You will want to check that you're getting the right amout of power to your sensor and signal from your pcm.

Since you said it ran great for a week with the new crank sensor... I'm willing to bet your male end of the harness (one on your engine) is corroded or has a short. This would explain why it just doesn't start anymore.

Google how to test a crank sensor with a multimeter. Does a much better job explaining it than I do Lol. Not very complicated.

Last edited by sxrsil3nt; 09-23-2013 at 02:10 PM..
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Old 09-23-2013, 02:11 PM
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If it's anything like a MAP sensor or Throttle Position Sensor and has a 3 wire connector, the 2 wires on the outside are 5 volts and ground inputs and the center wire is the signal.

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Old 09-23-2013, 02:31 PM
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Pins 2 (black with light blue tracer) is the ground and pin 3 (orange wire)is the 5v supply at the cam sensor.
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Old 09-23-2013, 07:11 PM
Vladek Vladek is offline
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had the same deal with my 97. turned up the be a loose connection. i had to zip tie the wire connector to the ignition coil.
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Old 09-23-2013, 07:42 PM
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The 4.7 has coil packs. It's unlikely they all failed or came loose.
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Old 09-24-2013, 08:04 PM
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true. but doesn't hurt to check. cheap and easy fix if that is the case.
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Old 09-24-2013, 08:04 PM
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4.7, 4x4, dakota, sensor, spark

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