Question about 2007 Dodge Ram 2500 Mega Cab Laramie

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5.9 DIESEL ENGINE CUTS OFF WHEN DRIVING

 Issue is sitting at a little over 14,000 miles brought truck in over 6 times for engine light coming on also engine cuts off. The tech replaced ECM unit. But, tech stated there are no codes showing the engine is shutting off. I am having issues with the engine shutting off while driving but will start back up when I restart it. Still after replacing ECM unit the engine still shuts off while driving but no codes are showing it is happening.  They have driven my truck a little over 140 miles in May with a data recorder but of course the problem did not happen. We got the truck is June 07 in Sept. it shut off twice, in Feb. it shut off more than few times and check engine light came on, but also in March.  but replaced the ECM then the engine shut off the day they replaced the ECM so I brought it back in but no codes stored. Did fine for April then in May engine shut off twice but no codes stored. The tech are stump and can not do any thing until a code(s) are stored. They are unable to let me borrow a data recorder and on top of you don't know when the problem will happen again but it is happening. I am frustrated HELP 

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  • Anonymous Nov 26, 2008

    2004 dodge durango - well maint -- 54,000 miles and just cuts off when driving -but no check engine light --- help

  • dmcc1944 May 08, 2009

    My diesel 5.9 is in a 94 Coachmen RV. I don't have check engine lights, but the engine will stop unexpectedly, even with power applied. It happens more frequently before the engine is up to operating temperature. It's really dangerous because, at low speeds, power steering is lost.

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Hi

From what I can gather, the engine cuts out and then the check engine light comes on, not the other way around, check engine light and then cut out?

If you switch on the ignition but do not start the engine, you will see that the check engine light is on. It won't go out until you start the engine.

When the engine cuts out, it is just as though you have switched on the ignition without starting the engine, the key is in the exact same position, and therefor the check engine light comes on purely and simply because the engine isn't running, not because it has sensed a problem, hence you have no fault codes, its perfectly normal.

If, however, the light comes on then the engine cuts out, then the reason for the lack of codes could be a short term electrical failure. If the power to the ECM were briefly cut then the codes would be erased immediately, but this would have to be a complete failure because there is a KAM (Keep Alive Memory) wire, which supplies permanent power to the ECM if I'm not mistaken. A good candidate for a complete failure is a bad main ground cable (loose or broken).

Wiring problems a just the worst ever to trace.

Just a thought to hopefully point you in the right direction.

Very best regards

Geordie

Posted on Jun 10, 2008

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