I have a 2000 Durango 4.7 eng. With trouble codes - P0340 ,P0320 ,P1391. Recently the car dies while driving and when I try to restart it the RPM surges right before it dies . If I let the car set for a few moments then restart it , it will start up with a rough idle which then I place it in Neutral and rev it up it will go back to normal for a while then die again.
The codes refer to Camshaft & Crankshaft Position Sensor. Are these replaced by simply unbolting and then replaced in reverse sequence without any adjusting? And do you think if these sensors are bad would they be the cause of the problems?

Thanks for any input.

It should be that straight-forward. After replacing the sensors, reset the ECM.

P0320 is related to the Crankshaft Position Sensor (CKP) but the P0340 is referring to the Cam Position Sensor (CMP). P1391 speaks to the CKP and/or CMP signals being intermittent. Find and repair the fault and intermittent goes away.
If the CKP was replaced but may require sychronizing with the vehicle's computer (ECM). If that checks out good, the problem is the cam position sensor or circuit. If you find that you need to replace the CMP, that may need to be "relearned" to the car as well.

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Originally Posted by CaptainRich

P0320 is related to the Crankshaft Position Sensor (CKP) but the P0340 is reffering to the Cam Position Sensor (CMP). P1391 speaks to the CKP and/or CMP signals being intermittent. Find and repair the fault and intermittent goes away.
If the CKP was replaced but may require sychronizing with the vehicle's computer (ECM). If that checks out good, the problem is the cam position sensor or circuit. If you find that you need to replace the CMP, that may need to be "relearned" to the car as well.

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Thank you for your answer CaptainRich.

I'm still not sure if repairing my car is within my abilities because of all the electronic stuff. I was thinking of taking it into the dealership and let them work on it, but every time I do I regret it. I end up taking it back because the problem wasn't fixed right.
If I do the work myself I'm thinking about replacing both sensors ($70, not bad) but how do I "synchronizing / relearn" my ECM ? I hope the "intermittent " part is due from the CKP or CMP.

I'm sorry to hear that you're having touble at some shops getting your fixed right the first time. Send them a link to this site and we'll help them as well.
The "remove and replace" is pretty easy. It's the synchronizing and relearning that can be a pain...
The synchronizing/relearn is done with a scan tool and some software, but may not be necessary for that particular vehicle.

I have a 2000 Durango, last year it started to change gea at the wrong times and was jerky. I took it to the Official Dodge dealer. I was told the gearbox was shot and would cost $4000 to repair. I was charged $175 for the diagnosis. I took it to a gearbox specialist, the problem was a faulty gearbox sensor, about $65. If you take your car to a dealer, get a written estimate. As for your actual question, I cannot help you this time. Best of luck.

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Originally Posted by H_man

Thank you for your answer CaptainRich.

I'm still not sure if repairing my car is within my abilities because of all the electronic stuff. I was thinking of taking it into the dealership and let them work on it, but every time I do I regret it. I end up taking it back because the problem wasn't fixed right.
If I do the work myself I'm thinking about replacing both sensors ($70, not bad) but how do I "synchronizing / relearn" my ECM ? I hope the "intermittent " part is due from the CKP or CMP.

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Iown a 2000 Dodge Durango 4.7L with about 96k miles on it. Today it wouldn't start, it would just turn over but never catch and start up. It was acting as if it wasn't getting any fuel. Check engine light was on, was able to get the codes by turning the key on, off, on, off, on within fives seconds. The codes were what you, P0320 and P0700. P0700 is more of a generic code so I decided to start with the crankshaft position sensor code (P0320). Bought a position sensor and replaced it, all works well now. I have a Chilton manual and it is pretty vague as to where the sensor is. It is under the Durango, next to the transmission housing. I believe the manual says it is "bolted to the cylinder block near the rear of the right cylinder head". Like that really helps. Anyway, the best way to locate it is, if your standing in front of the car for a reference point, follow the right exhaust manifold down to where it just starts to go under the car, the crankshaft sensor will be there. It is a three wired sensor, has a magnet on the end. People and the manual say check the voltage of the connector, I say just replace the sensor, forget testing the connector. The sensor cost me $42. Fired right up once it was replaced. I had the battery disconnected so when it fired up, the P0700 code was no longer there. The p0320 was still there, went to the local parts store, borrowed their code reader, erased the code, hasn't come back. Hope this helps, if anyone still reads this.

Txgreasemonkey (or anybody else): How do you "reset the ECM"

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Originally Posted by willhunt4food

Txgreasemonkey (or anybody else): How do you "reset the ECM"

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You haven't told us what you drive or what you symptoms are, but once any necessary repairs are made, the vehicle's ECM will run tests and if they pass, will turn off the Check Engine light and eventually clear the codes automatically. You can get them cleared quicker with a scan tool that has the correct software for your vehicle.