The car scanner diagnostic tool - Reading and clearing fault codes: When the vehicle ECU detects a malfunction, fault codes are generated. This tool reads the codes, shows their meaning to help technicians quickly locate the problem, and can clear fault codes after repairs. - Real-time data viewing: Monitors data from sensors and actuators in real time, including engine RPM, vehicle speed, fuel pressure, and more. Reading data streams helps assess engine operation and emissions, and provides maintenance recommendations to optimize performance. - Multifunctional: Supports diagnostics, engine trouble code clearing, data flow testing, and oxygen sensor testing. It can read battery voltage and vehicle information, improving repair efficiency. - LCD display and indicators: LCD display for easy reading. Three indicator lights: green means protocol detection is supported, yellow means the vehicle has a fault, and red means the device is normally powered on. Use scenarios - After check engine light appears, connect to read fault codes to identify likely causes and clear them after repair. - During a test drive, monitor real-time data such as RPM, speed, and fuel pressure to diagnose performance issues and verify fixes. - Use for routine maintenance or pre service checks by reading battery voltage, vehicle information, and performing oxygen sensor tests to plan service.