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DEF pump

   
Old Aug 18, 2019 | 02:19 PM
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Christie001
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Default DEF pump
We just rebuilt the engine on a 2011 Ram 4500. When should the DEF pump run? It runs everytime you turn off the truck after driving it. Is that normal?
 
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Old Aug 21, 2019 | 11:08 PM
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Is it running constantly or just a few seconds?

I’d have to look at the particulars for your truck but generally speaking the DEF pump and system should only be active during highway driving or a regen.
 
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