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Inspect pump inlet DEF line

Inspections List

Inspect DEF level Inspect DEF pump for noise Inspect for DEF leak Inspect DEF pump filter Inspect DEF pump outlet line Inspect pump inlet DEF line Inspect DEF pump inlet line to DEF tank Inspect Doser Valve
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Fixes List

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Inspect pump inlet DEF line

Use a 3/8 inner diameter hose (clear hose is preferred). Disconnect DEF pump inlet line. Located front left of DEF pump Connect new hose to inlet port on pump from one end and insert the other end in side the DEF tank or inside a portable DEF tank. Turn the truck on, you should observe DEF fluid flow.