What is OBD2 sensor?

OBD2 (On-Board Diagnostics II) sensors are part of a vehicle's onboard diagnostic system that monitors various engine and emissions-related parameters. They provide real-time data and diagnostics to help identify issues with vehicle performance and emissions control systems. OBD2 sensors include components like the oxygen sensor, mass airflow sensor, and vehicle speed sensor, which communicate with the vehicle's computer to ensure optimal operation and compliance with emissions regulations. This system also enables mechanics to troubleshoot problems using an OBD2 scanner.