Bosch eBike system error codes (Purion, Intuvia, Kiox, Nyon, before the smart system) · Bosch Purion, Intuvia, Kiox, Nyon

Error 620 on Bosch Purion, Intuvia, Kiox, Nyon

What it means + how to fix it From the manual

Quick answer

Error 620 on the Bosch Purion, Intuvia, Kiox and Nyon (before the smart system) means “Charger fault.” Most likely cause: a fault in the battery charger or its connection. Try this first: check the charger.

Code meanings vary by brand. The same number can mean different things on different displays and controllers. Check your bike's manual to confirm.

About the Bosch Purion, Intuvia, Kiox and Nyon (before the smart system)

Bosch prints this same table in the Purion (BUI215) MY2023 US manual (pages English 12 to 14). source
The same table is in the Intuvia (BUI255) MY2021 US manual (pages English 15 to 17). source
The same table is in the Kiox Online Version (BUI330) MY2020 US/CA manual (pages English 35 to 38). source
The same table is in the Nyon Online Version (BUI350) MY2021 US manual (pages English 66 to 69). Bosch notes code 430 does not apply to the BUI350. source
These displays belong to Bosch's older eBike system, not the smart system. The Bosch smart system (for example the Purion 200 and Kiox 400C) uses six-character error numbers instead. source
Bosch also lists "7xx" for faults in third-party parts, and "Display is blank" for an internal fault of the on-board computer. They are not single codes, so they are not in this list. source

In plain English

The system found a problem with the charger. Check the charger's plugs and cable. Only use the charger made for your battery, and have it checked if the code stays.

Step-by-step checklist

Work from the top. Steps go from free and easy to shop jobs. Switch the bike off before touching any connector. Tick each step as you go. Your progress is saved on this device.

1Check the chargerModerate Make sure the charger's light changes when it's plugged into the battery, and that both plugs are clean and fully seated. If you can, try a known-good charger with the same voltage and plug.
2Have the battery testedShop job A shop can test the battery and its protection circuit and tell you if it needs replacing. Never open the battery pack yourself.

Parts you might need

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Only buy a part if the free steps didn't fix it. Always match the voltage and connector type to your bike.

Replacement e-bike charger
Only if your charger is faulty. Must match your battery's voltage and plug type exactly.
Match your bike's model first. Ask a shop if unsure.

Still not fixed?

Pages to try next:

When it's time for a shop: if you've worked through every step and the problem is still there, take the bike to an e-bike shop. Bring your notes on when it happens, plus the code.