The Diesel Exhaust Fluid (DEF) sensor is an essential component in modern diesel vehicles equipped with selective catalytic reduction (SCR) systems. This sensor is responsible for monitoring the level and quality of the DEF, which is a solution used to reduce harmful emissions from diesel engines. The sensor communicates with the vehicle’s engine control unit to ensure proper dosing of DEF into the exhaust stream, helping to maintain compliance with emission regulations.
When the DEF sensor detects issues such as low fluid level or poor quality DEF, it can trigger warning lights on the dashboard and may even limit engine power to protect the emissions system. Regular maintenance and proper handling of DEF are crucial for ensuring the optimal performance of the sensor and the SCR system as a whole. It’s important for diesel vehicle owners to be aware of their DEF levels and follow manufacturer recommendations for maintaining this vital component.