Hi Michael, and welcome!

I have the exact same unit. If you PM me I will get my book out and we can figure it out together. Until then, you can try to take the batteries out for a few hours, then use the buttons on the bottom (which show witch area of your body you want to use it on). That changes the type of stimulation you get (pulsating, constant, short bursts etc.) I'm assuming that you cannot use it al all with the error code.

I also have a person at EMPI that calls me each month to check on my supplies. I will give you her number if you want. They are all very friendly and helpful there.

Kim