OBD2 Car Diagnostic Scanner MS309 – Fault Code Reader

Read & Clear Car Fault Codes in Seconds

Stop guessing what that warning light means. The upgraded MS309 OBD2/EOBD Code Reader gives drivers and mechanics alike the power to instantly diagnose car problems, read Diagnostic Trouble Codes (DTCs), and reset the check engine light — all without a trip to the garage. Compact, plug-and-play, and compatible with a wide range of petrol and diesel vehicles, this is the essential tool for every glove box.

Key Features

• Universal OBD2 / EOBD Compatibility – Works with most cars, SUVs, and light trucks manufactured from 1996 onwards that are fitted with an OBD2 port
• Enhanced Error Detection – Reads generic, manufacturer-specific, and pending fault codes for a thorough diagnosis
• Check Engine Light Reset – Clear stored DTCs and turn off the MIL (Malfunction Indicator Lamp) quickly and easily
• Live Data Stream – View real-time sensor data to monitor engine health as you drive
• I/M Readiness Tests – Check emission monitor status to know if your car will pass its next MOT or smog test
• Freeze Frame Data – Capture engine conditions at the moment a fault was triggered for accurate troubleshooting
• VIN Retrieval – Automatically reads the Vehicle Identification Number for quick vehicle identification
• No Battery Required – Powered directly through the vehicle's OBD2 port; zero setup needed
• Plug-and-Play Design – No software installation or Bluetooth pairing required; simply plug in and scan
• Clear, Backlit Display – Easy-to-read screen with a simple button interface for fast navigation

What's in the Box

• 1 × MS309 OBD2 Fault Code Reader Scanner
• 1 × User Manual

Compatibility

Compatible with all OBD2-compliant vehicles (1996 and newer) supporting protocols: CAN, ISO9141-2, KWP2000, J1850 VPW, and J1850 PWM. Not compatible with electric-only vehicles that lack a standard OBD2 port.

Country of Origin

Made in Mainland China.

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Further Reading

For guidance on vehicle emissions standards and OBD system requirements, visit the U.S. Environmental Protection Agency – On-Board Diagnostics (OBD).

Frequently Asked Questions

Q: What vehicles is the MS309 OBD2 code reader compatible with?

A: The MS309 OBD2 scanner is compatible with most petrol and diesel cars, SUVs, and light trucks sold in the US, UK, Europe, and Australia from 1996 onwards that feature a standard 16-pin OBD2 diagnostic port. It supports all five OBD2 protocols: CAN, ISO9141-2, KWP2000, J1850 VPW, and J1850 PWM.

Q: Do I need to install any software or app to use this scanner?

A: No software, app, or Bluetooth connection is required. The MS309 is a fully standalone, plug-and-play OBD2 fault code reader. Simply plug it into your vehicle's OBD2 port (usually located under the dashboard), and it powers on automatically and begins scanning.

Q: Can this OBD2 scanner turn off the check engine light?

A: Yes. After reading and reviewing the Diagnostic Trouble Codes (DTCs), you can use the MS309 to clear the codes and reset the check engine light (Malfunction Indicator Lamp / MIL) directly from the device — no additional tools needed.

Q: Does the MS309 scanner work on diesel vehicles?

A: Yes, the MS309 supports OBD2-compliant diesel vehicles as well as petrol vehicles, provided the vehicle uses the standard 16-pin OBD2 connector and is from 1996 or newer.