Restart G6 Sensor?


Definately not.

Actual physically new sensor is always using the code from the sticky label on the underside of the sensor.

You are still on G4 - right? When you see the G6, it makes more sense.

Here is an image I lifted from diatribe (thanks diatribe!!!)


This is a new G6 insertion device (upside down) which has the sensor inside of it. As you can see, the code (5937) for the sensor is on the bottom of the device. Once you have used a number of G6 sensors the codes start to look familiar. We have probably seen less than 10 different unique sensor codes. I don’t understand what they do or why one sensor has a different code than another. But my only reasonable assumption is that it is important and makes a difference.

So, on a new physical sensor, I will use the code from the label on the actual sensor.

I then keep the sticker with the code as well as record it in a spreadsheet such that if I want to restart later then I have the proper code.

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Thanks! Dexcom has been really awful with their shipping, lately - shipments have been going out (for me) about 8-9 days after order is placed and processed (can’t order any earlier as system won’t allow it). So it has been common for me to have my last sensor expire before the new ones arrive.

I tried this method to restart my sensor as I had no other alternative, and it worked exactly as described! I also had thrown out my code, so I had to calibrate at step 5, but I’ll be logging my codes from now on for the future. If I need to do this again, I’ll use a code at step 5 and report the result.

Once again! Thanks to Aaron2!!

Helpful tip, every time I start a new sensor, I put the code on the top of the paper that shows the LOT number and take a picture on my phone.
That way I can quickly and easily reference the information, date, time I inserted the new sensor.
Also, if you have to call Dexcom for an issue, you have the information handy.


@Aaron2 I’m 2 days into my restarted sensor using your method (thanks again!) - I had to calibrate initially as I didn’t have my code. Now it is asking me to calibrate every 12 hours - is there a way to stop it? I’m also following @Tim35 advice and have started an Excel spreadsheet to track my sensor codes.

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When calibrating the G6 manually, it should only be the first day which asks every 12 hours. After that, it should switch to once per day.

I’d likely take a photo of it with my phone. That way it is in Google Photos on my tablet, PC, and phone. I do that with all sorts of stuff like important receipts, serial number/model number stickers on cartons. Also that works great for model number plates on appliances so that I don’t have to contort myself like a pretzel to read off the model number or other info needed for tech or repair support.

I always take a photo of the G5 xmitters.

Worked great this time—thanks @Aaron2!

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I actually got into the habit of saving everything from a sensor when using Libre as sometimes I would want to call for a replacement or take the box back with the sensor to Walgreens. So with the Dexcom I keep the sensor applier in the plastic container with the sensor code paper in it and just put it in with the new sensors until I use a new one.
I have the box of the transmitter in there with my supplies too. i think taking a picture of the transmitter code is a good idea though and might start doing that.

Sorry to reply to an old post…

A couple of times, I’ve inserted a new sensor without removing the paper! Rather that waste the sensor, I used the manual calibration. I also applied some site tape (forget the exact name) to hold it in place.

A tip for extra adhesion: I found a spray adhesive on Amazon call QDA, Quick Drying Adhesive (points for creativity!) I don’t like spraying it as about half it drifts away in the air. I take a cotton swab and saturate with the spray and store it in a small pillbox the a screw on lid. I can use it for a couple of months. That makes it easy to apply exactly where I want it.

Also, I write the calibration code on the sensor tape along with the insertion date/time. A fine sharpie works well.

Just in case anyone else is still having issues. I followed Aaron’s steps above exactly except I had the code for the sensor to enter it the second time around. I use the reader and ignore my phone, in fact I shut down my phone for about the two hours after warm up has started. One time I had to do the whole process over and I believe it was when I still had my phone on. After I have the sensor good to go again I turn on my phone and it just picks up the old sensor as a new sensor.

But I have now done this with a few of sensors and have gotten a couple to go over 20 days and they were still going strong, I had to pull them off because of x-rays not because they stopped reading right!

I love the sensors to keep going because they stay pretty accurate after the first calibration and if I have a spot on one I want to keep it!!! I wear them on my arm and do have to apply more skin tac around the edges to keep them secure.

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This morning I started trying to restart my G6, 15 hours before it was to give out. I don’t have an iPhone. I couldn’t get the receiver to read the sensor. This afternoon, it suddenly started reading, so I restarted it and put it into the microwave for a couple hours. My G6 (which works through my Tandem pump) quit giving readings for a while while the receiver was in the microwave, but then started giving them again. But when I took the receiver out of the microwave, the pump stopped the readings. I was never able to get the receiver to get its readings over to the pump G6. I knew that the G6 had restarted because it was working on the receiver after it was to expire on the pump, so I decided to use that and see how long it would go. It’s not as nice as having the pump G6 work because the pump will shut off my insulin to keep me from going low. Maybe somebody can tell me what I’m missing. I don’t understand why the receiver has the reading but the pump G6 doesn’t get it.

Last night I got my receiver to start the G6 over but couldn’t get the pump G6 to show the readings. The receiver has continued to work, which is leading me to a question. Is that the way the extended time works if I’m using the pump G6? The pump G6 won’t show the reading but the receiver will? It’s a little more nuisance because I need to carry around the receiver, and the pump keeps signaling me that I have been out of range for x hours.

I wonder what would happen if I told the pump G6 to restart. Would it stop the receiver’s signals? If the receiver works a few more days, I can experiment by restarting the pump G6 and seeing what happens. At worst, I just have to insert a new sensor, which I was going to do anyway.

Running xdrip will do the restart automatically.
I have been using it to restart my G6, and I do NOTHING! It works everytime now for me.
And, unless I happen to know exactly when it is doing it, I never seem to miss any BG numbers, etc.

Thank you. I don’t know how to run xdrip. My phone is a cheap Galaxy J7, and the last I knew I couldn’t use the G6 with it. The G6 is on my pump, so I don’t miss the phone connection, but I wonder if I’m unable to use xdrop if I don’t use a phone.

Its possible you need to remove/replace transmitter (on same sensor), to get the tslim to recognize it as restart.

Check out the video in link below, to see how to remove transmitter, using BG strip.

Once removed, then wait, then put back on existing sensor, the tslim may start reading, or may need a 2 hr warmup.

@Tim35 does this work for tslim?

Thank you again. I am hoping to wait a few days to try that, so that if I don’t do it the right way I will just have to start a new one.

I’d still like to find out more about xdrip. It sounds wonderful.

@keepitsteady, I believe one time it came up on my phone to restart new sensor after I had restarted it on my receiver? And I just put in the code and did new sensor and it acted like it was starting and it just switched to reading the restarted sensor.

So I’m pretty sure you’d be okay, but not positive!!!

Thank you for the tip. That helps me be more confident, but I’m still going to wait to be safe. I don’t seem to do well with some technology that others don’t have much problem with.

You can not use both the Dexcom Receiver AND the Tandem t:slim X2 pump at the same time for your Dexcom sensor readings.

Paraphrased the rule from memory:
You can use:
One medical device (examples: Dexcom Receiver, Tandem X2 Pump)
One consumer device (examples: Smartphone)

You can not use both the Dexcom Receiver and the Tandem X2 pump at the same time. You must decide which one you want to use. Receiver or Pump.


The Dexcom G6 CGM transmitter can only be paired with one medical device (either a Dexcom receiver or t:slim X2 Pump) and one consumer device (phone or tablet) at the same time.

BTW - After switching to the G6, we never bothered to use the Dexcom Receiver. Not even once. Never saw a benefit for us. We use the Tandem t:slim X2 pump with Basal-IQ and an Apple iPhone running the Dexcom G6 Mobile App.

I don’t want to use both. What I’m trying to figure out is how to get the receiver readings to transfer over to the Tandem t:slim X2 pump. I got the readings on the receiver and that has extended my CGM sensor time past last night, but I would prefer to get the readings on the pump. In the last hour, the pump has been telling me to enter a transmitter code, but I can’t figure out how to do that. When I click on Options - My CGM - CGM Settings, the Transmitter ID box stays dark and can’t be changed, although I don’t want to change it because the ID hasn’t changed. It’s saying I have an invalid transmitter ID, apparently because it is being paired with the receiver.

I can live with the pump’s beeping a couple times an hour to warn me about being out of range or entering a transmitter code as long as the receiver keeps giving me extra time with the sensor, but if I could get the pump to show me the readings, I wouldn’t have to put up with all the extra beeping.