KONNWEI OBD2 Scanner Car Diagnostic Tool, Reading and Erasing Fault Codes

Important Note:

Please ensure the vehicle ignition is in the "ON" position when using this tool. This product is designed for 12V passenger cars and light trucks. Device compatibility strictly adheres to the following five standard automotive communication protocols: ISO 9141, KWP2000, SAE J1850 PWM, SAE J1850 VPW, and CAN (Controller Area Network). If your vehicle's Engine Control Unit (ECU) operates using a protocol outside of this established set, the diagnostic tool will fail to establish a successful connection, rendering it incapable of performing any diagnostic functions, including reading or clearing trouble codes. Please consult your vehicle's user manual or contact the manufacturer to verify that your engine supports one of these five protocols before purchase to ensure proper functionality. Do not expose the device to rain, snow, or wet conditions. It is recommended to record or print fault codes before performing erase operations to avoid losing historical diagnostic data. Ensure your PC has an active internet connection before updating the software.

Frustrated by the "Check Engine" light on your dashboard, tired of wasting time and money at repair shops, or struggling with complex, blurry diagnostic tools that fail to clear fault codes effectively?

Product Description:

[Comprehensive OBD2 Diagnostic Functions]

Supports core functions including reading and erasing fault codes, I/M readiness status check, O2 sensor test, EVAP system leak test (Mode 8), freeze frame data stream, on-board monitoring, and vehicle info retrieval. Whether for daily maintenance or troubleshooting, gain quick insight into your vehicle's health and stop relying on guesswork.

[One-Click Shortcut Keys & Smart Operation]

Features dedicated physical shortcut buttons on the panel for DTC (Read Codes), I/M (Readiness Check), VIN (Vehicle Info), and a separate Battery Check button. No need to navigate through complex menus-simply press one button for instant core functions. The device automatically enters the system upon startup, eliminating redundant manual confirmations.

[2.8" High-Definition Color Screen with Dual Modes]

Equipped with a 2.8-inch TFT high-definition color display (320x240 resolution) with clear icons. Built-in Day and Night dual theme modes ensure comfortable viewing whether in bright daylight or dim environments, making diagnostic data easy to read at a glance.

[Lifetime Free Software Updates & Printing]

Supports a Type-C connection to your PC for lifetime free software upgrades, keeping your database continuously updated for wider vehicle compatibility. Additionally, the PC software allows for one-click diagnostic report printing, convenient for keeping vehicle health records or communicating with professional mechanics.

[9 Language Support for Global Use]

Features an extensive multi-language system, including English, German, French, Russian, Spanish, Polish, Italian, Portuguese, and Dutch. Whether you are an individual owner or run an overseas auto shop, select your preferred language instantly for a smooth operating experience.

[Smart 3-Color LED Indicator Lights]

Built-in intelligent 3-color LED indicators on the front: Green light indicates normal engine operation with no diagnostic trouble codes; Yellow light implies a possible problem or pending DTC; Red light alerts to an engine issue with the MIL fault indicator on. Gauge fault severity without even looking at the screen.

Product Specifications:

Model: KONNWEI KW340

Screen: 2.8" 320x240 TFT Color LCD Display

Operating Voltage: 8V ~ 18V (Power from vehicle battery)

Operating Current: Min 131mA ~ Max 171mA

Storage Temperature: -20 C to 70 C (-4 to 158 F)

Dimensions: 163 (L) x 85.5 (W) x 23.5 (H) mm

Net Weight: Approx. 0.36 kg

Supported Languages: English, German, French, Russian, Spanish, Polish, Italian, Portuguese, Dutch

Interfaces: 16-pin OBDII Port / Type-C USB Port

Compliance: OBDII + EOBD (Standard gasoline vehicles)

How to Use:

1. Connect to Vehicle Diagnostic Port:

(1) Ensure the vehicle ignition is turned OFF.

(2) Plug the included 16-pin OBDII cable into the diagnostic port located under the vehicle dashboard, and connect the other end to the scanner main unit.

2. Power On and Vehicle Check:

(1) Turn the vehicle ignition key to the "ON" position (power on the dashboard, do not start the engine).

(2) The scanner will automatically power up and enter the main menu without any extra actions.

3. Execute One-Click Shortcut Diagnostics:

(1) Read Codes: Press the DTC button to instantly retrieve current engine fault codes and view detailed descriptions.

(2) Emission Pre-Check: Press the I/M button to check monitor status and confirm emission system readiness for annual inspections.

(3) Battery Check: Press the Battery Icon button to automatically perform a battery voltage test and display the health status.

4. PC Software Update and Print:

(1) Connect the scanner to a PC using the Type-C USB cable.

(2) Press and hold any button on the scanner (except the power button) while connecting to the PC, then launch the UPLINK PC software.

(3) Click "Check for Updates" for the free upgrade, or click "Print" to generate a physical diagnostic report.

Target Users & Scenarios:

Specifically designed for private car owners, DIY auto enthusiasts, and entry-level auto mechanics. Ideal for daily vehicle diagnostics, pre-purchase inspections for used cars, and self-checks before mandatory vehicle emissions testing.

What's in the box
1 x OBD2 Diagnostic Main Unit
1 x 16-pin OBD2 Connecting Cable
1 x Type-C USB Cable
1 x Colorful Retail Box
1 x User Manual