What happens if my DEF tank goes empty?
Before your DEF tank ends up empty, you will see an alert on your dash in the form of the DEF light. If your DEF drops below 2.5%, the light will be a solid amber. If you ignore the solid red, your vehicle speed will be reduced to a snail’s pace – 5 miles per hour – until you top up the DEF tank.
What does SCR DEF mean?
Selective Catalytic Reduction
Selective Catalytic Reduction (SCR) is an advanced active emissions control technology system that injects a liquid-reductant agent through a special catalyst into the exhaust stream of a diesel engine. The reductant source is usually automotive-grade urea, otherwise known as Diesel Exhaust Fluid (DEF).
Why do I use DEF fluid in the SCR system?
SCR is a technology that uses a urea based diesel exhaust fluid (DEF) and a catalytic converter to significantly reduce oxides of nitrogen (NOx) emissions. SCR is the leading technology being used to meet 2010 emission regulations.
Why do I need to replace my SCR system?
Could be a number of things… NOX sensors could be reading insufficient catalyst conversion efficiency – which could be as simple as replacing the air filter up to requiring the SCR to be replaced. DEF doser could need service, or some component of the DEF system (such as a heater hose) could be faulty.
What is the SCR system on a diesel truck?
Most new diesel trucks are equipped with selective catalytic reduction (SCR) systems that use diesel exhaust fuel (DEF) to meet EPA emission standards. What is a SCR system? The SCR system consists of a catalyst that reacts with engine exhaust to break down environmentally harmful exhaust components.
What should I do if I hit a SCR catalyst?
If it enters the SCR catalyst, significant damage can occur that may require servicing or even worse, a (costly) replacement of the catalyst. The DEF tank should be drained and thoroughly cleaned with deionized water before refilling.
How often does a SCR system fault occur?
Dash shows, SCR System Fault, Engine will Derate in <60 mins.. please help me.. Dealer says they cant take me in til Monday. Every month 400 people find a job with the help of TruckersReport.