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My Scanner Will Not Turn On or Charge. What Should I Do?

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Home › Questions & Answers › My Scanner Will Not Turn On or Charge. What Should I Do?
Beginner Applies to: UCAN-II, UCAN-II Pro

This is usually caused by a deeply discharged battery and can be resolved with a slow, steady charge.

Steps to Fix

  1. Use a 5V, 500mA–1A charger (not a fast charger)
  2. Plug the scanner in and leave it charging for at least 1 hour without turning it on
  3. Alternatively, connect it to a USB port on a powered computer and leave it for 2+ hours
  4. After charging, try turning the scanner on

If the Scanner Was Stored for a Long Time

  • The battery may be fully drained — charge for at least 1 hour before powering on
  • The LED light in the top-left corner should come on when charging

To Prevent This in the Future

  • Always power off properly: hold the power button for 5 seconds, then tap Power Off
  • Keep the battery at 70% or higher before storing

If the scanner still will not charge after trying these steps, contact support@youcanic.com. Battery replacements are covered under warranty. Out-of-warranty replacements cost $67.

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  • LEARN
    • Find by Vehicle
    • Video Library
    • Scanner Resources
    • Mechanic Fixes
    • Success Stories
    • Community Forum
    • Glossary
    • Advanced Vehicle Data by VIN
    • Share a Fix ✦
  • PRODUCTS
    • UCAN-II PRO
    • UCAN-HD-A
    • Oscilloscope
    • High Capacity Jump Starter RB6000A
    • Battery & Charging System Tester
    • Adapters
    • All Products
    • Rent a Scanner
  • TOOLS
    • AI Assistance
    • Calculators
    • VIN Decoder Basic – Free
    • VIN Decoder – Advanced
    • Recall Check
    • DTC Code Library
    • Parts Lookup
    • Owner’s Manual
    • Maintenance Schedule
    • Vehicle Market Value
  • SUPPORT
    • FAQs
    • Contact Us
    • Coverage Check
    • Track Order
    • Product Resources
    • Talk to a Mechanic
  • ABOUT
    • About Us
    • Contact Us
    • Press
    • Right to Repair: Every Car Owner’s Right
    • UCAN-II Product History

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