ScanTool Pro 1.21 – Advanced Diagnostic Tool for Your Vehicle

ScanTool Pro 1.21 is a powerful OBD-II (On-Board Diagnostics) software that allows users to connect to their vehicle’s computer system and perform comprehensive diagnostics. Whether you’re a professional mechanic or a car enthusiast, ScanTool Pro offers a full suite of tools to help you read, analyze, and clear diagnostic trouble codes (DTCs), monitor real-time sensor data, and ensure your vehicle is running smoothly and see VueScan .

It’s compatible with most OBD-II compliant vehicles and supports a wide range of protocols, making it an excellent choice for anyone looking to save time and money on car diagnostics.

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🧰 Key Features of ScanTool Pro 1.21

🧾 Read & Clear Trouble Codes

ScanTool Pro 1.21 allows you to read all stored, pending, and historic error codes and easily clear them after repairs are completed.

📈 Live Data Monitoring

Get real-time information from your vehicle’s sensors including engine RPM, fuel system status, coolant temperature, and more.

🛠️ Freeze Frame Data

Captures and displays a snapshot of the engine conditions at the time a fault code was triggered.

📊 Emissions Testing

Check your car’s readiness for emissions inspection with built-in monitors that show the status of important emission control systems.

💡 Check Engine Light Diagnostics

Quickly identify the cause of a Check Engine Light (CEL) and get suggestions for potential fixes.

🧪 Advanced Diagnostics

Supports oxygen sensor testing, EVAP system monitoring, and enhanced diagnostics for supported vehicles.

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🆕 What’s New in Version 1.21?

• Improved user interface for faster navigation

• Extended compatibility with newer car models

• Enhanced error code definitions with detailed descriptions

• Bug fixes and performance improvements

• Support for additional OBD-II protocols (CAN, ISO9141, KWP2000, etc.)

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🔧 How to Use ScanTool Pro 1.21

1. Install the software on your Windows PC or laptop.

2. Connect your OBD-II adapter (via USB or Bluetooth) to the car’s diagnostic port.

3. Launch ScanTool Pro and establish the connection.

4. Start scanning to read fault codes or monitor live data.

5. Clear codes after fixing the issue or save logs for review.

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🧑‍🔧 Who Should Use ScanTool Pro?

• 🚗 Mechanics: Get a reliable tool for diagnostics and repairs.

• 🏠 DIY Car Owners: Avoid unnecessary trips to the garage.

• 🚙 Used Car Buyers: Scan before you buy to check for hidden problems.

• 🛠️ Fleet Managers: Monitor vehicle health efficiently across multiple units.

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📋 System Requirements

• Operating System: Windows 7/8/10/11

• Processor: 1 GHz or faster

• RAM: 2 GB minimum

• Free Disk Space: 100 MB

• OBD-II Adapter: USB or Bluetooth (ELM327 or compatible)

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✅ Benefits of Using ScanTool Pro 1.21

• Saves time and money on diagnostics

• Easy-to-use interface suitable for all skill levels

• Supports a wide range of vehicles

• Provides detailed reports and exportable logs

• Works with most ELM327-based OBD-II adapters

✔ Tested: This software was tested on Windows 10 & Windows 11 and works smoothly without issues.

Frequently Asked Questions

• Is this software free?
  Yes, it can be downloaded and used for free.
• Does it support Windows 11?
  Yes, it works perfectly on Windows 10 and 11.
• Is it safe to use?
  Yes, the software was scanned and tested before publishing.

Last updated: February 2026