On-board diagnostics (OBD) codes are numeric trouble codes that identify a problem area within a vehicle’s emission control system or engine. They are used to help mechanics diagnose and repair issues with the vehicle. OBD codes are stored in the vehicle’s computer and can be retrieved using an OBD scanner.
OBD codes are important because they can help you identify and fix problems with your vehicle before they become more serious and expensive to repair. They can also help you pass emissions tests and keep your vehicle running smoothly.