What does water under pressure message mean?

I have had my Keurig 2.0 for a couple months..this morning (1/30/16) I received the same error message (water line under pressure...)..I Googled the issue and came across this page which obviously shows people have had the same issue but no resolution. I contacted Keurig and the most helpful person walked me through the process...there is an orange maintanance cup (has an open clear bubble in the center)...fill the bubble with water and into your Keurig like a k-cup, turn the power of and open and close 5 times...after the 5th time, open and remove maintenance cup...you should (I did) find coffee grinds in the bubble...this cleans the needed which removed the pressure...turn back in and run a water only process a couple of times and you should be good to go. Was lucky I held on to that maintenance insert...I normally throw things like that away. Hope this helps!!

"threw away my orange container, had great results using a paper clip,

open clip to look straight , insert the tip into the needle thats in the middle, its the second metallic protusion closer to the back.

push in and out several times , then just do hot water dispensing you will see lots of grinds in the water. this cleared mine at 5.30 in the morning, hope it helps."

Becky, this could be a clogged needle as well as check valve issue. Since your machine is less than 1 month old, return it. If it already gives you trouble, it will not get better in the future.

Just noticed this string and want to save people from going through what I went through the past 6 months. DO NOT USE SOFTENED WATER IN THE KEURIG 2.0 SYSTEM! I had months of incomplete cups and grounds in my cup – Keurig replaced my machine and I had the same issues with the new machine. I reached out to Keurig one last time and was finally told that the sodium in softened water has a negative affect on the pumping system in the 2.0 brewing machines. They recommended I switch to spring water – first running spring water through the system a few times before trying to brew a cup of coffee. I have done this for a week now and have not had one issue! It appears that this issue was just recently discovered and they are now educated to give this advice at their customer support centers. FYI – most water filters do not remove sodium from softened water.

I couldn't find my "maintenance cup," however, I took the coffee assembly apart, cleaned everything, and the message showed up again. So I removed the K cup and chose to dispense hot water--I did this a couple times, with a lot of coffee grounds showing, poured out the water, and then put the K cup back in. It worked great.

I found I wasn't pushing the cup down far enough to punch a hole in the bottom, works great now.