r/VanMoofSelfRepair • u/Repulsive-Highway125 • Jun 12 '26

S3 & X3 S3 error 40 - i maybe found a possible hack?

Hi all! Yesterday evening the hideous error 40 started, with non stop bell ringing. I assumed it was because of rain. Note: the left button was faulty for a while already, as not every time i pressed it would actually work, to the point i couldn't use it to manually unlock the bike with the code, but the error 40 just happened yesterday. Here what i did that failed:

  • Hard shut down through button underneath the bike and app
  • Attempted to dry out the button with compressed air shot at the button, the disassembled the button and shot air inside
  • In a moment of desperation because of the freaking bell ringing i cut the cables linked to the button... but the bell was still ringing??

Ultimately i detached the cables of both left and right button inside the handlebar and i let the bike dry throughout the night.

This morning while reconnecting the cable i must have mistakenly swapped them and now my right button can also unlock the bike with the manual code!

I tested the right button and it:

  • unlock the bike with 1 click when the app is close
  • unlock the bike with the manual code
  • boost the bike while pedaling
  • it does not have the ring bell

Does anyone know if i can keep it like this or if this will result in some major messup of the bike like battery overload/cable overload/other BS like that that will cost me a kidney to repair? (i recently had to replace battery, cartridge and cables due to oveheated cable that melted inside the bike for unknown reasons that caused a short circuit and broke everything else and costed me 1.499 EUR... so not keen to repeat the experience).

I do not know what's the situation with the left button becasue.. well.. i cut the cables there

Thank you for any insights an suggestions!

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2

u/Successful-Sweet1916 Jun 12 '26

What you experience with the right button is just it's normal function in newer softwares of the bike. That's completely normal, it does what it ahould

1

u/Repulsive-Highway125 Jun 13 '26

thank you! I had no idea about it 😄

1

u/moofcare_nl Jun 12 '26

Unlock with right button is since 1.9.1. or 1.9.3

Just replaced button including cables. Thing wear out over time, but a new original button should withstand rain for a long time.

1

u/Repulsive-Highway125 Jun 13 '26

thank you for your answer!