Error 55 · Err 55 · I2C3_FAIL

VanMoof Error 55, explained.

Q: Is Err 55 the same as Error 55?

Yes. The matrix display abbreviates it as Err 55. The bike's internal logs and the Moofment app's diagnostics screen show it as Error 55.

Also shown as Err 55 on the matrix display · symbolic name I2C3_FAIL

VanMoof's official documentation says Errors 55 and 56 "indicate that there is an issue with the bike's internal SIM card." Symbolic name for this specific code is I2C3_FAIL.

What to try

VanMoof's official troubleshooting sequence is the same for every error code. Work through it in order:

Step 1 — Make sure the latest firmware is installed. Pair your bike with the original VanMoof app (see callout below) and let it apply any pending firmware updates.
Step 2 — Reset your bike. Hold the power button until the bike fully powers down, wait a few seconds, and turn it back on. A 10-second power-button hold is Step 2 of VanMoof's official troubleshooting sequence and often clears transient codes.
Step 3 — Perform a system restart. If the code persists after a reset, do a full system restart from the bike menu.
Still unresolved? Visit a VanMoof Partner for diagnosis and repair. VanMoof's documentation defers to authorised service partners for any error that survives the three universal steps above.

VanMoofer is an independent site. We don't ship parts or repair bikes — we just help you understand what your bike is telling you, using VanMoof's own canonical documentation as the source of truth.

Use the original VanMoof app for firmware updates

Step 1 of VanMoof's own troubleshooting sequence is making sure your bike has the latest firmware — and that update path only exists in the original VanMoof app, not Moofment. Pair the two: VanMoof app for firmware, Moofment for live Bluetooth diagnostics on the S3/X3.

S3 / X3 only

Read Error 55 (and every other code) live.

Moofment connects directly to your VanMoof S3 or X3 over Bluetooth and reads diagnostic codes the moment they appear — with plain-language explanations and no cloud accounts. If you're staring at Err 55 right now, this is the fastest way to confirm what the bike is reporting.

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Frequently asked

What does VanMoof Error 55 mean?

Error 55 has the symbolic name I2C3_FAIL. I²C bus 3 startup. It belongs to the sim & connectivity group of VanMoof's S3/X3 diagnostic codes.

Is Err 55 the same as Error 55?

Yes. The matrix display abbreviates it as Err 55. The bike's internal logs and the Moofment app's diagnostics screen show it as Error 55 / I2C3_FAIL.

What should I try first when Error 55 appears?

Follow VanMoof's official 3-step troubleshooting sequence: install the latest firmware (via the original VanMoof app), reset your bike, then perform a system restart. If Error 55 still appears, visit a VanMoof Partner for diagnosis. See the 'What to try' section above for the full sequence and any code-specific hints VanMoof publishes.

Which VanMoof models show Error 55?

Error 55 belongs to the diagnostic code set used by the VanMoof Series 1 through Series 5 platform. In practice it appears most often on the S3 and X3, because that's where the matrix display surfaces it directly to the rider.

Can I read Error 55 from my phone?

Yes. The Moofment app reads live diagnostic codes over Bluetooth on the S3 and X3. Pair it with the original VanMoof app for firmware updates and you have full coverage.