A code reader is a necessary device that provides important diagnostic information about your vehicle. As the name suggests, these readers can check for warnings by quickly scanning the meaning of each light on your vehicle's dashboard. It can be difficult if your check engine light turns on but you don't know why. It's important to find a telematics solution that accounts for DTCs in order to diagnose vehicle issues and take appropriate action. ISUZU Diagnostic software is one of the best tools to provide telematics solutions that help you understand your DTCs on heavy vehicles.