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Old 09-22-2009, 10:09 PM   #1
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Cummins ISB trouble code and power loss

Hi all,

We just bought a new (to us) 2002 Journey 32DL with a Cummins 300 and Allison 6 speed ~64k miles. Mid-way home from the midwest to the west coast (1900 miles) we started to get an intermittent check engine light (CEL) upon coasting downhill (but only with the exhaust brake off and foot off the gas). Twice the rig even started spewing smoke and lost all power for a few seconds. The rest of the ride home I made sure to stay on the gas or on the exhaust brake, and the light didn't return while driving.

Now whenever I start the engine, or let the rig idle after parking it the CEL will come on and when I start driving there is very little power for a few seconds. Then the light goes out and things run normally.

Now we're home and I just installed the Silverleaf VMSpc software. The code that I get for the CEL is: ENG, SID, 254, 8, Controller #1, Frequency Error. I called Cummins and they don't even list a code 254 (maybe I should have asked for code 254-8???). Does anybody have any experience with something similar, or a list of Cummins codes that may shed some light?

Thanks in advance,
Lars and Tamara
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Old 09-23-2009, 03:12 AM   #2
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Lars and Tamara, welcome to We are glad to have you join us here and we look forward to reading to your adventures and experiences. I am sure you will enjoy the website and forums. Might I suggest that you also post this question in the Cummins forum. You will probably have a better chance of getting the info you need there quicker. Enjoy and keep us posted.
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Old 09-23-2009, 07:22 AM   #3
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Thanks, I just put the post over on the Cummins forum. Hopefully someone will be able to help.

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Old 09-23-2009, 09:23 AM   #4
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Duplicate thread - please make responses in the Cummins Engine forum. This thread is closed.
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