What color is associated with diesel exhaust fluid?

Diesel Exhaust Fluid (DEF) is color-coded blue to promote easy identification and ensure proper handling. This distinctive color helps to prevent confusion with other fluids, which is important for maintaining the proper operation of diesel engines equipped with selective catalytic reduction (SCR) systems. The blue hue serves as a visual cue for those working on or interacting with diesel vehicles, emphasizing the importance of using the correct fluid for emissions control. Proper use of DEF is essential for reducing nitrogen oxide emissions and meeting environmental regulations, making its identification and handling even more crucial in automotive maintenance and repair.