Upgrade of AL319Autel AL519 is a plug-and-play handheld OBD2 car check engine scanner. Upgraded from AL319, instead of just reading and clearing codes, AL519 can perform all OBDII functions (mode 1~10), and provide quick DTC lookup and live data in text & graph. It retrieves generic(P0, P2, P3, and U0), manufacturer specific(P1, P3, and U1) codes and pending codes, vehicle VIN, turn off CEL, check I/M readiness status for ready test, locate bad parts like a O2 sensor, do evap leak test, etc. Full OBD2 FunctionsGenerally only the scanners in auto parts stores are equipped with full OBD2 diagnosis, as they can handle more complex OBD2 issues. But this little guy has those too! AL519 car scanner integrates all OBD2 functions (10 modes), including: read code, clear code, view live data, freeze frame data, vehicle info, check I/M readiness status, O2 monitor test, on-board monitor test, EVAP leak test, modules present. Anyone who has cars knows its well worth the price! Read/