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P20E9 message on my 2015 Ram-can I still drive it in cold weather to get home?

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Can I drive the Ram 200 miles with this code?

Vehicle: 2015, Ram, 1500 3.0 l diesel

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P20E9 Reductant pressure too high

You should not  drive it, Two  possible scenerio has happens for P20E9 to occur , the DEF (diesel emission fluid) has leak out, or DEF line has a blockage due to crystalization.depending on which scenerio has occurred

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