Extending a Dexcom G6 Sensor

The Dexcom G6 CAN be restarted! There was a lot of hype when the G6 came out because Dexcom claimed that it was not able to be used beyond the initial 10 day wear. Thankfully, this is not true. 

I want to mention a few things before sharing how I restart my sensors. Please do this at your own discretion. The G6 is FDA approved for 10 day wear only and it is possible that the sensor isn’t as accurate the longer you wear it. I extend my sensors at my own risk, and so should you. Additionally, I’ve extended mine successfully, but of course cannot guarantee that yours will.  I found out about how to restart the G6 from a post by @coolreeree .

Second, this method will not deliver blood glucose readings during the restart and warm-up period.  You do not need to worry about the sensor expiring before you start the process (other methods require this).

Here’s how I restart my sensors (using the Dexcom app with an iPhone):

  1. Let your sensor expire. 
  2. Start a new sensor session and chose “no code”. You do not need to remove the transmitter.
  3. Let the warm-up session start and run for about 15 minutes. I set a timer on my phone.
  4. After 15 minutes, STOP sensor. It will warn that you cannot start a stopped sensor, but this is not true. 
  5. Start another new sensor and chose “with code”. (Choose this only if you have the code for the sensor you are wearing. Do not enter a code from another sensor or make one up. If you do not have the code, choose “no code”. You will need to calibrate with this option, but the sensor will still restart.)
  6. The sensor will warm-up for two hours and start giving readings after

That’s it. Literally. It’s super easy. 

Have you used another method to restart your G6? I’d love to hear how. There are lots of ways to do it, but I’ve found this to be the easiest.

57 Comments

  1. We’ve had difficulty restarting for the past couple of months. Has Dex upgraded and installed some bug that is catching restarts?

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    1. I just attempted to restart mine tonight and mine failed as well. I tried 4 different times. And kept getting start a new sensor. So I’m now down to 1 more to last me till August

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  2. Sorry for all the messages so I wanted to update. After deleting dexcom off Bluetooth and uninstalling dexcom app and re-installing it I have successfully restarted my expired sensor. So good to know what to do when I get my next box of sensors.

    Liked by 1 person

  3. OK so my g6 expires today and I decided to end it before the expiration. I followed the steps you provided to extend it and I got an error message that said you can only use one sensor per session you need to replace the current sensor. Is this normal and what do you do?

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  4. I have to restart my sensor today. However I’m using the dexcom app as I don’t have a reader. How do you stop the sensor on the app after you start the sensor with no code? Anyone know?

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      1. awesome. im going to try this on my last sensor i have right now till i get the other ones. an hope it works cause im going on vacation in 2 weeks so i need this to last!!!!

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  5. Thank you for posting this how-to. So, I have extended my G6 to make the change at the most convenient times. Now I’m left with one more insert and the app is asking to pair with a new sensor.
    Do you know if I can pair with the current sensor again so that I can use the last insert? And then, more importantly, will I be able to pair with the new sensor when this session is finished?

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  6. Do you have to first wait for it to expire or can you do a “Stop Sensor” then restart & follow the steps?

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  7. I just started using the G6 after years on 4 and 5, and wondered what this sensor code thing was and whether it would affect extended wear, and if so, how to get around it. So I googled and found all the info I needed here.

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  8. For me and with Samsung s8+ reading was perfect , today is end of second cycle 20 days , and all reading are perfect.
    now iam starting to extend for the second time … lets see how long more i can use the same sensor.

    I will keep you updated……………..

    * I have Samsung 8+ and i am only using the app to extend.

    Liked by 1 person

  9. Amazing i have samsung s8+ and it works excellent to me. …. Thank you
    Can you tell me how long maximum you can extend the sensor and will it stays accurate.

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      1. What is the typical end look like? Just no signal or does the readings get all funky? I’m about to extend the sensor for the second time tonight so I’m coming up on 20 days and wasn’t sure what to expect.
        Thanks for posting! What a money saver this is!!!

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      2. For me and with Samsung s8+ reading was perfect , today is end of second cycle 20 days , and all reading are perfect.
        now iam starting to extend for the second time … lets see how long more i can use the same sensor.

        I will keep you updated……………..

        * I have Samsung 8+ and i am only using the app to extend

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    1. I use the receiver and my iPhone and the receiver will pick it up later. I have used this method twice now on the same sensor, so I got 30 days out of it instead of 10 and still accurate.

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  10. Thanks so much for this awesome post!!! Worked like a charm when I had a couple sensors with the same code which would always fail about 25 minutes into the restart!!!

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  11. Worked with code on iPhone. Previous attempts with other sensors with receiver and by disconnecting Bluetooth didn’t… thank uuuuuuu!!

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  12. I tried this but when mine expired and I started new sensor and after 15 minutes I went to “stop sensor” but there was nowhere to sto it. Just said warning up. After about 1/2 hour message came up saying “you must use new sensor. Am I missing something or did the update the App?? Thanks

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    1. It does say warming up on the main screen, so you need to go Settings, scroll down to the very bottom to Stop Sensor. I’ll add this to the post to be more descriptive of how to stop the sensor.

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    2. Is there anyway to get around this error? This is my last sensor I have cause my supplier has yet to ship my new order of them. So I really need this one to restart? Any tips? I’m trying the process again this time I took the dexcom off my Bluetooth.

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      1. I wish I had an answer for you. I probably would have done what you did, forget the transmitter in Bluetooth and repair it. Then start the sensor again. Crossing my fingers for you!

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      1. Now I can tell you that is does 🙂

        Before I tried another restart option. You need to stop sensor at least 2 hrs before it expires, forget transmitter in the phones Bluetooth connections list then restart and keep the phone far from the transmitter.
        It worked 2 times, and on the 3rd transmitter just could not pair back with the phone, even after I changed the sensor to a brand new one.
        So the way you suggested is not only easier but also much safer in terms of securing the connection between transmitter and the phone.
        Thank you!

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  13. Trying it now, fingers crossed. I forgot to stop it first and restart it. I stopped it before it expired and restarted w/o code. 50 minutes later it told me to use a new sensor. Trying this way now although I suspect since it caught once already I was trying to reuse one that the sensor is toast. Will keep ya posted. Happy holidays hun! We should do another meet up!

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