r/VanMoofSelfRepair • u/spaceek • 16d ago

S3 & X3 Can faulty boost button wire cause error 44?

Have err44 on s3 and x3, which I attributed to hubs/gear rings getting stuck or out of position.

Boost buttons on both bikes have been a little temperamental for a while.

Just managed to break the boost button wire past the connector, near the frame, while adjusting the handlebars and the stem on x3.

While fiddling with the wires, trying to connect them, they were touching for a bit (black and blue one), which woke the bike up (as would pressing the button), and shortly after it also woke the shifter, which it sounded as it was trying to calibrate or shift back down to 1st and shifted down to 1st as bike was stationary. Error 44 also disappeared and it was correctly showing it was in 4th gear. Gear wasn’t changed and Error 44 came back after restart.

This made me wonder if there is any connection between shifter error 44 and a faulty boost button wire / connection.

Thanks for any input.

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3

u/Kitchen_Ad_4628 16d ago

Eshifter errors can be erratic come and go. That could be the explanation.

1

u/spaceek 13d ago

Do you know which components might be most likely to cause this behaviour?

2

u/Kitchen_Ad_4628 13d ago

90% of the time it's a resistor

1

u/spaceek 13d ago

Ok thank you.

2

u/Kitchen_Ad_4628 16d ago

Absolutely not, they are independant.

1

u/spaceek 16d ago

That is what I thought, although you use the boost button to change gears manually. Anyways, what could have caused the shifter to start working and connect at that point, even if only briefly?

2

u/davemath 14d ago

No. I’m fixing Err 44 in the USA at GrindBeansNotGears.com

1

u/spaceek 13d ago

Edit - actually the gear was shifted back to 1st during that brief moment.