Topic
Diagnose and fix common e-bike problems including battery, motor, and electrical issues.
If your e-bike loses power on bumps, check battery seating and cable connectors first. Here is how to inspect them safely and when to see a shop.
Cold slows a lithium-ion battery's chemistry, so 10-30% less range is typical. Here is why, what helps, and why charging a frozen pack is the real risk.
A cold e-bike battery often won't charge because the charger blocks it near freezing. Why, how to warm it safely, and when to get it checked.
When 95-99% is normal, and how to check temperature, charger, display and battery age in order when an e-bike battery stops short of 100%.
What Shimano W010 and Bosch code 540 say, what to do when assist fades or stops after hard riding, and when to take the bike to a dealer.
Charger light codes vary by brand. How to tell a full battery from a failed charge, what a protection circuit does, safe checks, and when to stop and get help.
Display lit but no motor assist? Check settings, brake cutoffs, pedal and speed sensors and error codes in order, and know when to stop and see a shop.
Why an e-bike battery gauge sags on hills and rebounds at rest: internal resistance, cold and aging, how to tell them apart, and when to get the pack checked.
Why an e-bike battery percentage jumps or drops: how the gauge estimates charge, cold and load effects, what is safe to try, and when to get it checked.
Throttle works but pedal assist does nothing? Check settings, brake cutoff, the cadence sensor, magnet and wiring in order, and know when to see a technician.
PAS works but the throttle is dead: check whether the bike should have one, then settings, connector and cable, and when to hand it to a dealer.
Dead e-bike? Check battery seating, charge, temperature, display and cables first, and know when to stop and take it to an authorized dealer.