Works on all 12V gasoline and diesel vehicles that are OBDII compliant. It can identify the cause of the CHECK ENGINE light and perhaps fix it without going to see your dealer. Assists you in easily passing annual emissions tests and SOMG CHECK. It covers full OBD II/EOBD diagnostic functions for engine systems. O2 sensor test, EVAP systems test, and board monitoring test give you full control of your vehicle's running status, while a graphical and numeric live data stream display helps you identify faulty sensor readings. Battery Test can test all automotive cranking leadacid batteries, including ordinary leadacid batteries, AGM flatplate batteries, AGM spiral batteries, and Gel batteries. Use scenarios Daily driver maintenance: When the CHECK ENGINE light appears, plug the device into the OBDII port to identify fault codes and monitor live data. This helps you understand the likely cause and may guide a basic fix without a trip to the dealer. Emissions readiness: Before an annual smog/SOMG CHECK, use the tool to verify OBD II status and readiness monitors, increasing the chance of a smooth emissions test. Seasonal battery health: Before long trips or in cold weather, run the Battery Test to assess the health of your starting battery and determine if a replacement is needed, suitable for various leadacid chemistries.