What Does It All Mean?
Every time you start the engine these days you are likely greeted by a light show on the instrument cluster (a.k.a. the digital dashboard). The dashboard now seems to have a light to inform us of just about everything and anything going on with the truck. As you roll down the highway, computers and electronics are now taking over monitoring your most important systems. We have lights for the fuel system, exhaust aftertreatment and selective catalytic reduction (SCR) system, anti-lock braking system (ABS), engine systems and just about everything else you can imagine.
Of course, I am sure you have noticed all of these lights and changes in system monitoring already, but the problems arise when we fail to stop and inspect the issue or just choose to keep driving. I have actually been in a shuttle van where the owner placed a piece of black tape over the check engine lamp. Imagine his repair bill! Ignoring warnings like these may lead to engine derate (the decrease in maximum capability of the truck) and eventual shutdown or the possibility of major damage.
The following graphic illustrates light symbols and what they monitor. Spend a few minutes getting to know your dash lights and what they are telling you before they come on can help you make quicker and safer decisions if they do pop up. The best place to find the correct information for your specific truck is in the owner’s manual. Have a safe and worry-free drive!