How to find error codes, recognise typical fault symptoms and solve many issues yourself. For safety-relevant topics (e.g. brakes) or persistent error messages, please contact a dealer.

Bosch: Error code glossary Shimano: Support/FAQ Dealer support

60-second quick check

1) Restart & contacts

System off/on (hold the power button for a few seconds).
Battery fitted correctly? Contacts clean/dry?
Display/control unit connected properly?

2) Sensors & start position

Magnet/speed sensor clean, correct gap?
Do not stand on the pedal at start-up (torque sensor).

3) Battery & software

Battery sufficiently charged and at room temperature?
App/display firmware up to date (Bosch Flow / Shimano E-TUBE)?

4) Safety

If there are loud noises/overheating: end the ride.
Persistent faults → dealer diagnostics (note the error code).

Bosch eBike Systems – typical fault symptoms & solutions

Symptom

Self-help

Note

Doesn’t start / display stays off

Insert/check the battery, clean contacts, hold power for 5–10 s, click display/remote into place correctly.

If repeated: dealer

Speed not detected

Check magnet position on the spoke/adjust; keep the sensor clean; gap as per the manual.

Check the error code on the display

Temperature warning (hot/cold)

Let the system cool/acclimatise; avoid high gears; charge the battery at room temperature.

If the warning persists: dealer

Communication/system error

Check connectors (display/remote/drive unit); restart the system; perform an app/display update.

Note the error code → dealer

Look up exact codes: Bosch Help Centre – error messages • Manuals/updates: see Bosch apps.

Shimano (STEPS/EP series) – typical fault symptoms & solutions

Symptom

Self-help

Note

Warning at start-up (e.g. pedal load)

Do not stand on the pedal at start-up; restart the system; then test.

If it persists → dealer

System error (e.g. E010/E012)

Switch off → check battery/connector plugs → switch on again; update app/firmware (E-TUBE).

Note the error code → dealer

Battery/connection issue

Remove/refit the battery, check contacts, charge at room temperature; for LED blink codes see the manual/FAQ.

If it continues → dealer

Speed sensor/magnet

Check magnet position/gap, remove dirt; inspect cable/connector.

If the fault remains → dealer

Exact codes & app tips: Shimano Support/FAQ • App/updates: E-TUBE PROJECT Cyclist.

Quick selection: I want to … ⇒ How to do it

Goal

Steps

Link

Find code meaning

Note the code from the display → choose the correct manufacturer → search the code overview.

Bosch

Update app/firmware

Pair the smartphone → open the app (Bosch Flow / Shimano E-TUBE) → install updates.

E-TUBE

Book dealer diagnostics

Describe the error code and situation; bring a photo/video if possible.

Dealer search

Frequently asked questions

Where can I find the meaning of my Bosch error code?

Directly in the Bosch Help Centre. Enter the code exactly as shown on the display.

How do I proceed with Shimano?

Note the code ➝ check the Shimano Support/FAQ ➝ if necessary, update the firmware with E-TUBE PROJECT.

When should I go straight to the dealer?

For safety-relevant problems (brakes, cracks, loud noises), recurring system errors, damaged cables/connectors, or if the motor assistance is unpredictable.

Next steps

Note the error code, carry out quick basic checks and, if required, get help directly via our dealer network.

Find dealer/service

Error patterns & solutions for Bosch & Shimano

Any questions left?