CGM features and fixes · Dexcom G7

Dexcom G7 sensor error

On G7 a temporary sensor problem shows as Brief Sensor Issue. It often happens on the first day and usually clears within 3 hours; it can lead to Sensor Failed. (Dexcom)

What the maker says to do

1. Do not remove the sensor.
2. Use your meter for treatment decisions.
3. Tap Help in the app for more troubleshooting.
4. If it lasts more than 3 hours, contact technical support in the app at Profile > Contact.

More on the Dexcom G7

• Follower app not updating
• Signal loss
• Warm-up
• Sensor failed early
• Compression lows
• Alarms not sounding
• Follower not getting alerts
• Compatible phones

Sensor error on other CGMs

• Dexcom G6
• Dexcom ONE+
• Dexcom Stelo
• FreeStyle Libre 2 and 2 Plus
• FreeStyle Libre 3 and 3 Plus
• Medtrum TouchCare Nano CGM
• Eversense 365
• Medtronic Simplera
• SIBIONICS GS1

Sources, quoted

• Dexcom: “This issue often happens during the first day of a sensor session, but it can happen anytime. It usually fixes itself within 3 hours.”
• Dexcom: “Don't remove the sensor. Use BG meter for treatment decisions.”
• Dexcom: “Check your sensor and tap "help" in app for more information on troubleshooting.”
• Dexcom: “If Brief Sensor Issue continues for more than 3 hours, contact technical support (in the app, go to Profile > Contact). Brief Sensor Issue may lead to Sensor Failed alert.”

Every quote is checked against its source page before each update of this site; last checked 2026-10-06. Makers change their apps; the source page is the authority when it differs.