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 is find a Repair Shop Near Me that can handle the issue for you. The SCR Fault Derate can be anything from the DEF Fluid not being the correct mix to the SCR Catalyst failing. Where we find most of the problems with SCR Faults is with the NOX Sensors and DEF Line Heaters. Quite a few times we find that we have Wiring Problems where the wires were not tied up correctly and they chafed on metal edges and wear through. We’ve had to go as far as pulling the whole harness out of the truck to find where the wires were rubbed through fix it then put the harness back in the truck. Other times the NOX sensors or def heaters have failed and the only fix is putting new sensors or DEF Heater Lines in. No matter what Emissions System Problems your Truck is having give us a call and we can get them fixed and get you back on the road again. We work on all diesel vehicles from Automotive to Class 8 Heavy Duty truck and Heavy Equipment.