WHAT TO DO IF YOU GET DEF IN YOUR FUEL

Ultimate Diesel Builder's Guide - - Repairing A Def-contaminated Fuel System -

If you sus­pect you have DEF in your diesel’s fuel sys­tem, do not drive the ve­hi­cle and do not at­tempt to start the engine. Don’t even turn the key on, as this will en­er­gize the fuel sys­tem and could pump Def-con­tam­i­nated fuel into the rest of the fuel sys­tem. If the er­ror is caught be­fore the key is turned, the fix may be as sim­ple as drop­ping the fuel tank and flush­ing it out.

Have the ve­hi­cle towed or flat-bed­ded to a re­pair fa­cil­ity, and if you need to un­lock the steer­ing col­umn, be sure to dis­con­nect the bat­ter­ies be­fore turn­ing the key in the ig­ni­tion. Make sure to get your ve­hi­cle re­paired right away, as DEF is cor­ro­sive and let­ting it sit in the fuel sys­tem can cause fur­ther dam­age.

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