You have a short somewhere. The first thing to check is your distance sensors…is one or both of them plugged in backwards?
The next thing to check is your solder joints. Are there any solder bridges? Is there any loose solder pieces on the board that could be shorting together 2 solder joints? Look carefully. You may want to re-flow the solder joints just to be sure.
Let me know what you find.
-Brach