Description
YMIOT • OBD2 Automotive Diagnostic Tool MS309 Pro
The YMIOT MS309 Pro is a professional automotive diagnostic tool designed for full OBD2/EOBD vehicle coverage. With a 2.4-inch display and durable plastic housing, the tool connects directly via the 16-pin OBD2 port and supports vehicles running 5-18 V. It reads engine fault codes, performs battery voltage tests, checks emissions readiness, and delivers freeze-frame and real-time data streams. CE, FCC, and RoHS certified, this tool is intended for technicians, DIY enthusiasts, and pro mechanics who want reliable engine diagnostics in a compact format.
Key benefits
- Reads and erases generic, manufacturer, and pending engine fault codes.
- Real-time data streaming up to 88 real-time parameters (PIDs), including engine speed, coolant temperature, and oxygen sensor data.
- Checks battery voltage, monitors battery condition, and performs battery health evaluation.
- Freeze-frame data capture and emission readiness (I/M readiness) status for regulatory compliance.
- Retrieves vehicle info like VIN, CID, CVN for diagnostics and identification.
Supported protocols
- SAE J1850 PWM
- SAE J1850 VPW
- ISO 9141
- KWP2000 / ISO 14230
- CAN (ISO 15765-4)
Supported functions
Depending on vehicle compatibility, the following functions are supported:
- Reads trouble codes (generic, manufacturer-specific, pending)
- Erases/clears fault codes and resets “Check Engine” light
- Real-time data streaming of sensors and parameters (real-time engine data)
- Vehicle information retrieval (VIN, CID, CVN)
- Freeze-frame data display (snapshot when a fault occurs)
- Battery testing: voltage measurement, monitoring, performance evaluation
- Checks I/M readiness (emissions monitor status)
Included items
- 1 × diagnostic scanner (Model MS309 Pro)
- 1 × OBD2 16-pin cable (integrated connector)
Supported languages
English, French, German, Dutch, Spanish, Chinese














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