What is T500 error code?

The t500 error may appear when the mobile app cannot pair with the pump.

Helpful Tips:

  • Ensure that you are logging into the mobile app using your existing t:connect account credentials. 
  • If you are unsure of what email address your pump is associated with, you can click on the “Forgot Email” button from the sign in page. 
  • If the issue persists, uninstall, then re-install the t:connect mobile app.

You can download a PDF of pairing instructions by clicking here.

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Customer Support

Need help with your Dexcom CGM?

Tandem handles issues with the connection between your Dexcom transmitter and t:slim X2 pump, questions about calibration, the “---” display, and sensor failures after the 2-hour warmup period. To report a sensor failure after the 2-hour warmup period, visit tandemdiabetes.com/G6Form

For all other CGM issues, including sensor failures during the 2-hour warmup, “no restarts” alert, or physical problems with your sensor or transmitter, such as bleeding, bruising, skin reaction, adhesive issues, applicator issues, or broken wires, you should contact Dexcom using one of the options at dexcom.com/contact.

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