Carthage Auto Repair

Why Does My Dash Say Service Def System? This is a question we get a lot and many things can cause this and we will go over some of the reasons this message comes up on your dash. Another question we get is Why Does My Truck Have A DEF System? We will look at both questions and give you some answers of why Diesel Trucks have a DEF System and why the Service DEF System message comes up on the dash. We will look at Why Does My Truck Have A DEF System first. The main reason late model Diesel Trucks and Cars have a DEF System is to control the amount of Nitrogen Oxides (NOx) that the vehicle emits. The EPA has mandated that the OEM’s had to control the Emissions that the Diesel Engine emits. The DEF Fluid gets injected into the exhaust stream before the Selective Catalytic Reduction (SCR) unit. The Def Fluid goes through a mixing tube and enters the SCR unit, and the DEF Fluid reacts with the SCR and reduces the NOx and lowers the emissions coming out of the tailpipe. When the Servi ... read more

      Why Does My Truck Keep Having Emission Problems. These issues can be frustrating to deal with whether this is your personal diesel pickup or it’s your Heavy Haul Truck that you use to haul freight. We realize that anytime the wheels aren’t turning on your vehicle your loosing money. We have the factory software to hook to most of Class 8 trucks and medium duty vehicles. We also invest in training so that we understand these emission systems and how they work so that we can fix them right the first time and get you back on the road. We will look at some of the most common problems we see. You may be driving your vehicle and dash lights up with SCR Fault Engine Derate in 4 hours. If you get this message on the dash and you ignore it and keep driving your truck it will go into Derate and you will notice a loss of power if you keep driving, you will end up at 5 mph and getting a tow to get your truck fixed. The best thing you can do when this happens i ... read more