Hello, I’m Nathan, and I’ll be assisting you today. My livelihood depends on your positive feedback, so your satisfaction is my highest priority.
Sorry to hear you’re having trouble.
This error indicates an air leak.
This can be from bad/loose tubing, or a faulty pump/pressure assembly.
Remove the upper housing and you'll see the pump assembly at the left. Check that the tubing hasn't come loose.
If that is intact, then the pump assembly would have to be replaced.
Thanks for the update.
Still related though, it is an air/pump issue.
With this error it can be resulting from an improperly seated cartridge. If there is not a good seal between cartridge and the input port on the printer air can leak causing this.
Remove the cartridges, check them over carefully for any packing material (tape, foil, etc) and reseat them tightly.
If no change back to checking the tubing and pump.
I'd take them out once more, wipe them off well on cartridges as well as where they mate up inside.
Unplug power for 5 minutes to reset, then if it still persists the printer needs to be serviced (most likely with the pump replaced).
I would do both to make sure there is nothing obstructing them.
After that, the printer would have to be taken apart to inspect the tubing and pump and most likely replace the pump/pressure assembly. This is generally not considered a DIY job though. I can help you with service options you can send it in to if you'd like to try that route.
Use qtips moistened with rubbing alcohol.