Tuesday, April 2, 2013

Dodge Durango Will Not Start And Shuts Down Going Down The Road

Vehicle Starts And Dies

Dodge Durango will not go over 30 mph revving up the engine the engine light is ON

OBD codes P0320 & P0700.

2000 dodge durango that does not want to start at times shuts down going down the road now it dont want get over 30 mph revving up the engine the engine light is ON.



EXPERT's REPLY:

First Retrieve The error Codes.
The simple Procedure Is as Follows:

Cycle the key from off to on three times ending with it on and watch the digital odometer display. Don't crank the starter, just off to on. The codes start with a P and have four numbers, there may be more than one stored.

Error Codes are :
P0320 & P0700.


Reason for OBD Code P0700:


P0700 sets in the engine controller when there is a code stored in the trans controller. If you're having transmission symptoms then the codes will need to be read from the trans controller using a scan tool to further diagnose that. It's likely that there is a code in the trans controller that's related to the other issue though.


Reason for OBD Code P0320:

P0320 is related to your starting and dying problem for sure.
P0320 sets when the engine controller doesn't see an input from the crankshaft position sensor.

Where Is Crank Sensor Located And What It Does?

The crank sensor is mounted to the right rear of the engine block and reads off a tone wheel on the crankshaft. It tells the controller where the crank is in it's rotation and it's speed and is the main input needed for spark. This code sets when it knows the engine is turning but sees not crank sensor input.


What are possible causes for this problem to occur? And from where to start troubleshooting this problem?

Possible causes for this would be the sensor or it's wiring. I would recommend taking a look at the wiring and connection and if all looks ok then replace the sensor with a Mopar part. This code is almost always set by a failing crank sensor.

The trans controller also gets the crank sensor signal and will set a fault code if it drops out, so what is stored in the TCM may be a P0725 because of the crank sensor issue. I would repair the crank sensor first, clear the codes by disconnecting the battery and see if the P0700 does reset.

If it does then you know something else trans is going on and you'll have to get a scan tool on it. If a scan tool won't power up when connected then there is either a connection problem, wiring problem to the data link connector, or the IOD fuse is blown.



So Should I Get The Vehicle Scan for Error Code First OR Replace Crank Sensor?

What I Suggest Is, The first thing you're going to have to do is repair the crank sensor issue. Without a clean crank sensor signal it's not going to run correctly or possibly not at all. May be there are multiple problems going on at the same time but it may just be the crank sensor. The first thing you'll need to do is visually inspect the crank sensor wiring and connector, if everything looks ok then go ahead and replace the sensor with a Mopar part, disconnect the battery to clear codes and then see how it runs.


This details will help.
Thanks.


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