Read and Clear Faults: Detects engine fault codes (DTC) and turns off the Check Engine light. Live Data: Displays real-time engine performance data, speed, and sensor readings. Battery and Voltage Test: Monitors the car's battery voltage and alternator charging status moment by moment. Massive Database: Contains a library of over 35,000 fault codes with detailed explanations. Emissions Test: Supports I/M Readiness test for gas emissions and oxygen sensor test. Compatibility and Usage Limitations General Compatibility: Supports most cars that use the standard OBD2 protocol (typically 1996 models and newer). Exceptions: Not compatible with hybrid cars, new energy vehicles, or older models that do not use the OBD2 protocol.