Thanks for your response but I should have been more clearer. This is happening when I'm trying to plug in the hotwire. The esc wasn't on or running. Just while trying to program But I was just making sure I had the plug in all the way and right and maybe once outta five times of re plugging it in to the hotwire it would show that code. It could have been 1/3/7 like you stated but I couldn't get it to do it everytime not sure if that helps figure out the problem. the esc was bought from a friend but I know it works and he had the his hotwire on it. Plus i can't get to read my gen2 rs either that I bought first hand. I even tried using the esc plug instead of the fan port.