MS309 Pro OBD2 Engine Fault Code Reader & Battery Tester

Read and Clear Engine Fault Codes

Quickly retrieve engine-related diagnostic trouble codes and clear stored codes after the underlying fault has been repaired.

Live Engine Data

View supported real-time vehicle information such as engine speed, coolant temperature, vehicle speed and fuel-system data.

Basic Battery Check

Monitor battery voltage and perform a basic battery-condition assessment directly through the vehicle's OBD2 connection.

Freeze Frame and I/M Readiness

Review vehicle conditions recorded when a fault occurred and check the status of supported emission-system monitors.

Plug-and-Play Operation

Connect the integrated 16-pin plug to the vehicle's OBD2 port. No external battery, smartphone application or Bluetooth pairing is required.

Identify engine-related problems before replacing parts or visiting a workshop with the MS309 Pro OBD2 Engine Fault Code Reader and Battery Tester.

Designed for convenient home, roadside and workshop use, this compact diagnostic scanner connects directly to a compatible vehicle's 16-pin OBD2 port. The device is powered by the vehicle, allowing it to operate without batteries, charging, Bluetooth or a mobile application.

The scanner can retrieve and clear supported engine diagnostic trouble codes, display code information and provide access to live vehicle data. Freeze-frame information helps show the operating conditions recorded when a fault was detected, while the I/M readiness function displays the status of supported emission-related monitors.

A dedicated battery-check menu allows the user to monitor battery voltage and perform a basic battery-condition assessment. The clear 2.4-inch display and four-button control layout make menu navigation simple for both vehicle owners and technicians.

Its compact wired design makes it suitable for storing in a glove compartment, toolbox or workshop service kit.

Important Compatibility Information:

This product is intended for vehicles equipped with a standard 16-pin OBD2 or EOBD diagnostic port. Vehicle year alone does not guarantee compatibility. Available functions and live-data readings depend on the vehicle manufacturer, ECU and supported OBD2 protocol.

System Limitation:

This is an engine and emissions-related OBD2 code reader. It is not a full-system diagnostic scanner and does not diagnose ABS, airbag/SRS, TPMS or other manufacturer-specific control modules. It does not provide ECU coding, key programming or bidirectional active tests.

What's in the box
1 X MS309 Pro OBD2 Diagnostic Scanner Set