KONNWEI KW340 OBDII Car Diagnostic Code Reader Scanner with 2.8" Screen

The KONNWEI KW340 OBDII Diagnostic Code Reader is a professional automotive scanner designed for fast and accurate vehicle diagnostics. Compatible with most 1996 and newer OBD-II compliant vehicles, it allows users to read and clear fault codes, monitor live engine data, test O2 sensors, and reset the check engine light. Featuring a large 2.8-inch display, multilingual support, battery voltage monitoring, and diagnostic reporting, the KW340 is ideal for DIY vehicle maintenance, workshops, and professional automotive diagnostics.

Key Features

Comprehensive OBDII Vehicle Diagnostics

Designed to deliver full OBDII diagnostic functionality for compatible vehicles, the KW340 helps identify engine and system-related faults quickly and accurately. It supports essential vehicle diagnostics including engine monitoring, emissions system checks, fault detection, and performance analysis, making it ideal for both DIY vehicle owners and professional automotive technicians.

Read and Clear Diagnostic Trouble Codes

Easily reads stored, pending, and permanent diagnostic trouble codes (DTCs) directly from your vehicle's onboard computer system. After repairs or maintenance, the scanner can clear engine fault codes and reset the check engine warning light, helping restore normal dashboard operation without requiring a workshop visit.

Large 2.8-Inch High-Visibility Display Screen

The built-in 2.8-inch display provides a clear and easy-to-read interface for viewing diagnostic information, fault descriptions, live data streams, and system menus. The screen layout is designed for convenient navigation and improved readability in both garage and roadside environments.

Real-Time Live Data Stream and Freeze Frame Monitoring

Monitor live vehicle performance data in real time, including engine RPM, coolant temperature, fuel system operation, sensor readings, air intake information, and more. Freeze frame data allows users to capture and review vehicle conditions recorded at the exact moment a fault code was triggered for easier troubleshooting.

Advanced O2 Sensor and On-Board Monitoring Tests

Supports oxygen sensor diagnostics and onboard monitoring tests to help evaluate engine efficiency, fuel consumption, and vehicle emissions performance. This functionality assists users in identifying emissions-related problems before inspections or long-distance travel.

Battery Voltage Monitoring and Charging System Check

Displays real-time vehicle battery voltage to help monitor battery condition and charging system performance. This feature is useful for detecting weak batteries, charging irregularities, or alternator-related issues before they result in starting problems.

One-Click DTC Lookup and I/M Readiness Testing

Convenient shortcut functions provide fast access to diagnostic trouble code retrieval and emissions readiness status checks. The I/M readiness feature helps determine whether the vehicle is prepared for emissions testing, saving time during inspections and maintenance.

Automatic Startup Vehicle System Scan

Automatically begins scanning vehicle systems when connected to a compatible OBDII port, allowing users to quickly detect faults and access diagnostic information without complicated setup procedures. This streamlined process improves efficiency during routine diagnostics.

Dual Day and Night Interface Themes

Features selectable day and night display modes for improved visibility and reduced eye strain under different lighting conditions. Whether working in bright daylight or darker workshop environments, the interface remains comfortable and easy to read.

Wide Vehicle Compatibility with Multi-Language Support

Compatible with most 1996 and newer OBDII-compliant vehicles, including many petrol and diesel models. The system supports multiple languages including English, French, German, Dutch, Spanish, Russian, Portuguese, Polish, and Italian, making it convenient for users in different regions.

What's in the box
1 x KONNWEI KW340 OBDII Scanner
1 x OBDII Connection Cable
1 x User Manual