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And this video we are working on a Duramax with a poor exhaust fluid quality message on the dash and the vehicle has gone into limp mode. This video is a diagnostic overview of what we did to fix the poor exhaust fluid quality message and get the vehicle out of limp mode.

We also had coolant temperature codes along with some glow plug codes. I will show you how to do a reductant fluid quality test along with a service Regen with the factory Tech 2 scan tool.

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For the most common automotive fixes to the most common car and truck problems