I never use N. Mostly because it doesn't charge the battery, as manual states clearly.
I'm always using P when washing my car.
Than fold the mirrors.
Than set wipers on manual (I'm keeping it on Auto at any other times).
If it's not cold and I have a good charge on the battery, I put the car on electric only.
And when parking sensors start beeping, mute those with the button on the wheel.
Likely while washing the car you got really low on battery. If the error doesn't reappear you should be good.
I'm always using P when washing my car.
Than fold the mirrors.
Than set wipers on manual (I'm keeping it on Auto at any other times).
If it's not cold and I have a good charge on the battery, I put the car on electric only.
And when parking sensors start beeping, mute those with the button on the wheel.
Likely while washing the car you got really low on battery. If the error doesn't reappear you should be good.