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Old 06-06-2017, 02:53 PM   #1
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OBD2 Reader

Will an OBD2 reader like this one work with my Cummins 300 ISB engine?
https://www.amazon.com/gp/product/B0..._rd_i=15707381

Son is offering to give me one for Fathers Day, but we don't know if it will work with my motorhome. I think he's hoping this will help me diagnose issues with the motorhome and prevent any more nights stranded along the highway. (another story).

My experience with the computer diagnostics so far is that they don't necessarily give you the answer that you are looking for, but will give you clues. Both Cortez Diesel and Unlimited Diesel Repair (Shallow Water, TX) used the computer diagnostics, but ended up chasing the problem using conventional detective-like skills to find the problem.

Your opinion will be appreciated.

Ron Everson
Cortez, Colorado
2003 Bounder 37U
Freightliner chassis w/Cummins 300 ISB and Allison Transmission
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Old 06-06-2017, 03:06 PM   #2
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You probably have a J1939 port so an OBD2 scanner won't work. Google silverleaf VMSPC. I have one and it is worth every penny.
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Old 06-06-2017, 03:50 PM   #3
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For large diesels, I think the ScanGauge D is the most bang for the buck.

https://www.scangauge.com/products/scangauge-d/
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