I installed a PSW v1 on an E92 335i. These errors are displayed:
The only part I was unsure of was swapping the pins into connector A7. The BMW instructions say Green/Brown and Brown/Green, but the 2 wires are both Yellow/Brown and Brown/Yellow. I tried it one way and the horn didn't work, so I swapped them and then everything was functional.
I tapped into the 12v cig lighter power, but that wouldn't throw these codes would it?