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I have a 2001 Chevy duramax(LB7 motor). I am using a Hypertech programmer and wanted to change a setting, but a trouble code of PO307 needs to be addressed before I can change settings. I am wondering what that code means? How serious is it? Thanks, Mike

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Sparkplug on a diesel????? it is a cyl 7 misfire but n o sparkplugs on diesels

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P0307- Fault Cylinder C-Misfire Detected (CYL7)

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Its means there is misfire in the engine cylinder 7 please check the wiring of the spark plug ..................



Good luck...

Posted on Aug 06, 2008

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