EMERGENCY - Adblue low warning

My car was low in adblue a while back so I put a gallon in and it lasted to my next Oil Change. When I put the gallon in a few laters to mileage went back up on the warning.

now I am low again. When it got down to the 10-mile warning, I added an extra gallon of adblue. In driving more than 10 miles, now I have the red light that says it will not start again. But I just added a whole gallon of adblue to the adblue tank. Is it not recognizing that it still has at least a gallon left?

I have an appointment and I'm afraid when I come out, my car will not start even though I refilled a gallon of adblue.

Should I just plan to have the car towed home?

I just filled mine today, took about 10 min for it to clear the low adblue warning on the dash. Why not just fill the thing and not worry about it for another 20k+ miles instead of only adding a gallon at a time at the last minute?

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When you do what you have done you can expect trouble. When you get the warning the first time fill it up. It takes 5 gallons. Why do you keep putting such a small amount in and driving it down to the limit. It may not start any more without dealer intervention. Have it towed to the dealer. The countdown starts at 1500 miles and you waited till it was empty several times.

Oh boy. This is going to be a expensive mistake

I doubt it. Just fill up the DEF, maybe disconnect the battery for a few minutes and it should be good to go.

When the warning started, did it start counting at 1,500 miles or something less than that.

I ask, because ALL Vw's that use adblue are supposed to give you a warning every time you start your vehicle when you have 1,500 miles worth of adblue left.

If your car gave you the first warning and started counting at 250 miles (for example), then there is a problem with your Adblue level sensor and needs to be replaced. If you are still under the Dieselgate warranty, it will be covered.

If your car started counting at 1,500 miles like it was designed to and you waited until you only had 10 miles to go, then this is your own fault and it is time to pay the piper.

FYI, when my Passat says 1500 mi to go I stop and pick-up a 2.5 gal jug of DEF and add the whole thing. No worries, no spills, no overfilling threat. Couldn't be easier, now at 200k miles.

At Wally World you can buy it in 2.5 gallon containers. That's what I do on my 2015 Golf. Then when it goes in for an oil change - the shop tops it off.

OP being cheap!
Cost of DEF fluid at truck stops is less than $ 3.00 a gallon. No reason not to fill the tank.
I've never ever had the warning come on since I keep my DEF tank topped up.

I had similar issue with my Passat, although the Ad-blue tank was full. Ended up being a bad NOx sensor, which the dealer said was going to cost about $900 to replace. Having said that, running the Ad-blue tank to empty and only adding a gallon at a time is seriously asking for trouble. I found only adding a gallon when the tank got empty often times was not enough to reset the reading. Good luck.