The HP Tuners RTD4 is a versatile diagnostic and tuning tool for your vehicle. Whether you need an ultra-fast standalone diagnostic scanner or a direct gateway to flashing custom tunes from us here at MSD, the RTD4 delivers professional-grade control in a compact device.

Key Highlights & Features

• Zero License Required for Diagnostics: Use the RTD4 right out of the box as a standalone diagnostic and data-logging tool. Licensing (Universal Credits) is ONLY required if and when you decide to PROGRAM / FLASH a new tune into the vehicle.
  
  
• Free Diagnostic Software: Compatible with HP Tuners' world-renowned VCM Scanner, allowing you to read DTCs (Diagnostic Trouble Codes), clear check engine lights, and monitor real-time engine telemetry in depth.
  
  
• Motorsports Ready: Seamlessly connects with the TrackAddict App on your phone to combine real-time vehicle telemetry with video recording and lap timing for track days.
  
  
• Custom Remote Tuning: Pair with custom tuning services to send logs and receive tune files directly for flashing when you are ready to upgrade performance.
  
  

Software & Downloads

• HP Tuners VCM Scanner: Download the industry-leading diagnostic software for free directly from HP Tuners VCM Suite.
  
  
• TrackAddict App: Turn your mobile device into a powerful motorsport data logger and lap timer. Learn more at HP Tuners TrackAddict.
  
  

Do I need credits to use this tool for diagnostics only?
No. You do not need to purchase credits/licensing to use the RTD4 to scan codes, view live sensor data, or record diagnostic logs. Universal Credits are only required when writing/flashing a calibration or tune file to a vehicle's ECU/TCU.