Common OBD-II Terms: Diagnostic
The word "diagnostic" refers to any on-board test run by the vehicles Diagnostic Management System. A diagnostic is simply a test run on a system or component to determine if the system or component is operating according to specification. There are many diagnostics as shown in following list:
- Misfire
- Oxygen Sensors
- Oxygen Sensor Heaters
- EGR
- Catalyst Monitoring