Does DEF cause your truck to stop running? 🤔 Not exactly. DEF is part of your truck’s emissions system, but issues like low DEF levels, contaminated fluid, or problems within the SCR system can trigger warnings and eventually limit vehicle performance. That’s why using quality DEF and keeping an eye on your system matters. 💪 #BlueDEF #Diesel #DEF #DieselTrucks #TruckMaintenance