Read & Reset CEL: the ET331 obd2 scanner diagnostic tool enables you to quickly check your car when the check engine light (CEL, MIL or SES) turns on: read generic and manufacturer-specific error codes (DTCs) with the definitions along with freeze frame and other diagnostic data. You can then fix simple problems and clear the CEL. Full OBD2 Functions: with support for full 10 OBDII modes, you can read: pending, stored and permanent DTCs; real-time sensor data (SAE standard PIDs) in chart or graphic; Evaporation check; O2 sensor & on-board monitor test results; and VIN reading. I/M readiness with hot key lets you know whether your vehicle will pass SMOG CHECK or not. Universal Vehicle Coverage: Works with all vehicles that are OBD2 / EOBD compliant (cars and light trucks made since year 1996 in the US, 2001 gas & 2004 diesel in UK & EU, etc.). It provides accurate and fast diagnosis for worldwide car owners. Supports all OBD II protocols: KWP2000, ISO9141, J1850 VPW, J1850 PWM, and CAN. More Versatile & Practical: It features a built-in DTC database with more than 35,000 DTCs (compared to normal 3000+ DTCs in basic OBD2 readers), 10 language options, and three LED indicator lights for DTC and connection status. It can even check current battery voltage so you can quickly know your battery status. Easy To Use: plug & play, powered by OBD II port directly, portable design with anti-slip protective sleeve; 2.8’’ clear color display with contrast adjustment & color scheme selection. Supports DTCs & live data review & print, and free update via Windows PC.Manufacturer: Exctool Model Number: ET331 Part Number: ET331The Exctool ET331 is an all-new upgrade from basic OBD II code readers in all aspects. Not only can this full OBD2 mode OBD2 diagnostic tool read diagnostic fault codes and freeze frame data, it can also read live engine parameters, O2 sensor test/ on-board monitor test results and do an EVAP test to better help you diagnose car issues. It‘s plug and play: plug into your vehicle's 16-pin OBDII DLC and you are ready to go. It has a huge DTC library and will be a very useful and reliable auto accessory which offers comprehensive vehicle information for rapid, accurate diagnosis and repair.