Notice: 1. If you have any problem during the usage of the product, please come to me for help. 2. If the CD you received can not read or broken, please contact us to get link to download. 3. Do not leave any negative feedback or make dispute without contact us first. Thank you XTOOL Advancer AD20 Best Chose of Car Owner AD20 is an upgraded version of AD10 and ELM327 independently developed by XTOOL. It not only covers all OBD2 functions of ELM327 Bluetooth, but also adds engine diagnosis and other extended functions. Car owners can record all driving data and simple diagnosis of the car through AD20 Why choose XTOOL Advancer AD20 ? 1. AD20 can read the error code of OBD2 and clear the error code, and analyze these error codes (what causes) (how to solve) (what should be done now) 2. AD20 supports engine diagnosis(check engine light on), which can detect the error code of the entire engine (only supports engine code reading/detect code) 3. AD20 supports driving records and driving analysis, each driving data will record and analyze the fuel consumption, distance, and some driving behaviors during driving. 4. AD20 supports the performance test of the car, you can see some values and performance of the car through the acceleration of 100 meters 5. AD20 supports HUD function and there are many online exquisite instrument styles for you to replace 6. AD20 software is independently developed by XTOOL, the latest Bluetooth 5.0, supports Android and IOS. And the software is free and constantly updated 7.AD20 Full Pin High-quality chips and shells are tested repeatedly before delivery, and various problems can be solved through hardware and software upgrades. No need to worry about any quality issues XTOOL Advancer AD20 Function: 1.Read Code 2.Erase Code 3.Live data 4.Componet Test 5.Smog Check 6.Engine Diagnostic 7.Trip Management 8.Performance Test How to solve problem by AD20 Advancer?