Diesel Exhaust Fluid

Diesel exhaust fluid (DEF) is a liquid that is used in selective catalytic reduction (SCR) systems to reduce the amount of nitrogen oxides (NOx) in the exhaust emissions of diesel engines. SCR systems are a type of emission control technology that is used to meet increasingly strict emissions standards for diesel engines.

DEF is a clear, colorless liquid that is composed of a mixture of urea and deionized water. When injected into the exhaust stream, the urea in DEF reacts with the NOx emissions to convert them into nitrogen and water vapor, which are much less harmful to the environment.

DEF is typically stored in a separate tank on the vehicle and is injected into the exhaust system by a metering device. It is important to maintain the proper level of DEF in the tank, as running out of DEF can cause the vehicle’s emission control system to malfunction and potentially result in reduced performance or damage to the engine.

DEF is an important component of a vehicle’s emission control system, and it is essential for meeting increasingly strict emissions standards. It is important to use the correct type of DEF in your vehicle, as using the wrong type can potentially cause problems with the emission control system. It is also important to follow the manufacturer’s instructions for using DEF, as using too much or using it improperly can potentially cause engine damage or other problems.

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