Dexcom G7 Sensor Failure: What Should We Do About It?

Dexcom G7 Sensor Failure


Are you interested in knowing about Dexcom G7 sensor failure and what actions you can take to address this issue? Dexcom G7 is an innovative continuous glucose monitoring system designed to assist people with diabetes to manage their blood sugar levels efficiently.

However, it may encounter sensor-related challenges that can affect its accuracy and reliability.

In this article, we will dive into common problems associated with Dexcom G7 sensor failure. You will also get to know the potential causes behind such issues, and the steps you can take to troubleshoot or resolve them.

Understanding the importance of maintaining accurate glucose readings, we are committed to providing you with valuable insights to help you overcome any sensor-related hurdles.

Understanding Dexcom G7 sensor failure

Dexcom G7 sensor failure refers to situations where the continuous glucose monitoring system fails to provide accurate and reliable readings. In this way, they leave users uncertain about their blood sugar levels. Such inaccuracies can lead to incorrect insulin dosing decisions, potentially impacting diabetes management as well as overall health. Let us discuss some common types of errors that causes Dexcom G7 sensor failure

Dexcom G7 false low reading

The Dexcom G7 sensor may show a false low reading. Such readings are highly troublesome for the patients. It can be due to multiple reasons. One of the most common reasons in this matter is compressed or broken sensors.

No reading at all

Sometimes, Dexcom G7 may show no reading at all. One of the primary reasons for this Dexcom G7 sensor failure is that it is far away from the display device. Sometimes when you check it under water you may see no reading at all.

Connectivity issues

Connectivity issues are included in the most common ones while using the Dexcom G7 sensor. It may be due to the error of the mobile App. This failure can also occur because of poor Bluetooth signals.

See also: Reasons For Dexcom G6 Sensor Failure A Comprehensive Analysis

Common signs of sensor failure

Identifying potential sensor failures is vital for prompt action. Here are some common signs that may indicate Dexcom G7 sensor failure:

Inconsistent readings: Frequent fluctuations or sudden drops/spikes in glucose readings that don’t match your physical condition or other blood sugar measurements.

No signal or communication error: Your Dexcom G7 receiver or app displays “No Signal” or “Communication Error” messages.

Calibration issues: The sensor may prompt frequent calibrations, yet the readings remain inaccurate.

Unreliable trend arrows: The trend arrows indicating blood sugar direction may not align with how you feel.

Sensor not lasting full 10 days: Premature sensor failure, where the sensor stops functioning before the recommended wear time.

Potential causes of Dexcom G7 sensor failure

Understanding the possible reasons behind sensor failure can help you troubleshoot and address the issue more effectively. Several factors may contribute to Dexcom G7 sensor failure:

Insertion problems

Improper insertion of the sensor can lead to inaccurate readings. If the sensor is not securely placed or inserted at the correct angle, it may not function optimally.

Sensor aging

As the sensor ages, its accuracy may decline, leading to discrepancies in glucose readings over time. Regular sensor replacement is essential to maintain reliable results.

Sensor calibration

Inaccurate calibration or failure to calibrate the sensor when prompted can affect the system’s performance and lead to unreliable readings.

Compression and pressure issues

Applying excessive pressure or compression on the sensor site, especially during sleep or physical activities, can interfere with the sensor’s ability to accurately measure glucose levels.

Interference from medications or supplements

Certain medications or supplements may interfere with the sensor’s readings, causing inaccuracies.

Troubleshooting Dexcom G7 sensor failure

Now that we have a better understanding of Dexcom G7 sensor failure, let’s explore some troubleshooting steps:

Double-check sensor insertion

If you suspect a sensor issue, start by ensuring proper sensor insertion. Follow the manufacturer’s guidelines carefully and make sure the sensor is securely placed on a clean, dry skin site.

Monitor sensor age

Keep track of how long the sensor has been in use. Replace it after ten days, as recommended by Dexcom, to maintain accurate readings.

Calibrate correctly

Calibration is not required by Dexcom G7. However, if you want to calibrate the sensor you must do it as prompted by the device. Make sure you follow the calibration process accurately. Use fingerstick tests to verify and calibrate the readings when needed.

Avoid compression

Be mindful of applying excessive pressure or compression on the sensor site to prevent interference with glucose readings.

Account for medications and supplements

If you are taking medications or supplements that might impact glucose levels, discuss this with your healthcare provider and consider additional testing to cross-verify readings.

Contact Dexcom support

If you have followed the troubleshooting steps and are still experiencing Sensor Failure, reach out to Dexcom’s customer support. They will provide you with further assistance. Dexcom can provide personalized guidance and may offer a replacement if necessary.

Go for a better option!

If you are facing Dexcom G7 sensor failure problems frequently, you can opt for a better option. Either you can replace the previous device or buy Dexcom G7 sensor from a reliable platform such as CGM Monitors. It is because we offer original devices at market-competitive prices.

If you are looking for a better option, you can visit our website and find CGM devices of multiple brands. Buy a Freestyle Libre 3 sensor in replacement. It is because this innovative device by Abbott comes with outstanding features as well as high accuracy. You will also face lesser sensor failure problems with this device.


Dexcom G7 sensor failure can be a frustrating experience for individuals relying on continuous glucose monitoring to manage their diabetes effectively. Understanding the common signs and potential causes of Sensor Failure is crucial to taking prompt action and maintaining accurate glucose readings.

By following the troubleshooting steps provided and seeking support from Dexcom’s customer service, you can ensure a smoother experience with your Dexcom G7 system and continue effectively managing your diabetes.

Remember, proactive management is the key to success in diabetes care, and we are here to support you on your journey toward better health and well-being.

Frequently Asked Questions

What is Dexcom G7 sensor failure?

Dexcom G7 sensor failure refers to situations where the continuous glucose monitoring system fails to provide accurate and reliable readings, leaving users uncertain about their blood sugar levels.

Is sensor calibration required for Dexcom G7?

No, calibration is not required for Dexcom G7. However, if you choose to calibrate the sensor, do it as prompted by the device and use fingerstick tests to verify and calibrate readings when necessary.

What if I am still experiencing Dexcom G7 Sensor Failure despite troubleshooting?

If you have followed the troubleshooting steps and are still facing sensor failure, reach out to Dexcom’s customer support for personalized assistance. They may offer further guidance or a replacement if needed.

Are there alternative options to Dexcom G7 if I frequently face sensor failure issues?

If you face Dexcom G7 sensor failure frequently, you can consider alternative options. One option is to replace the device with another Dexcom G7 sensor from a reliable platform such as CGM Monitors. Alternatively, you may explore other devices like the Freestyle Libre 3 sensor which may offer a lesser chance of sensor failure.

What is the key to effectively managing diabetes with Dexcom G7?

Proactive management is essential for effectively managing diabetes with Dexcom G7. Understanding the signs of sensor failure, taking prompt action, and seeking support from Dexcom’s customer service are crucial steps to maintain accurate glucose readings and improve your overall diabetes care experience.

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Comments (3)

  1. Pingback: Dexcom G7 Falling Off Problems & Top Tips for Secure Wear

  2. My dexcom g7 has failed 50% of the time. Can you explain what is going on. It fails as soon as it’s put on during calibration. I’ve lost 3

    1. If you’ve set a calibration, you might notice “Calibration Not Used” in your history tab.This means your Dexcom G7 sensor couldn’t use the calibration you entered, so your glucose readings may not match your blood glucose meter. If you see this message, wait a bit for the sensor to adjust. Afterward, try calibrating again in about an hour using a fresh fingerstick/finger prick.

      To ensure an accurate blood glucose meter reading, follow these steps:

      Wash your hands with soap and water.
      Dry your hands.
      Take a fingerstick/finger prick.

      We are looking forward to your feedback.

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