电动自行车维修指南与故障码

A flat black e-bike hub motor standing on a grey workbench next to a disc brake rotor, a freewheel cog cluster and two round multi-pin connectors.
How to Choose an E-Bike Motor Wheel: 5 Measurements to Take Before You Buy a Bafang Hub Motor
Five checks to make before ordering a Bafang hub motor: rear dropout gap against OLD, brake rotor mount, freewheel or cassette, wheel size, and voltage and motor plug. It also... 阅读详细内容…
Diagram of a hub motor cable torn where it leaves the axle, next to a 9-pin replacement lead with a plug on one end and loose wires on the other
Hub Motor Cable Torn Off at the Axle? How to Tell If It Can Be Rewired
A hub motor cable torn off where it leaves the axle can often be replaced, but only once you know what else was damaged. Before you plan a rewire, confirm... 阅读详细内容…
A black rubber handlebar grip, a fan of steel hex keys, red and black test probes and two small black cable connectors on a grey workbench.
Rad Power Bikes Throttle Not Working: Test the Throttle and Pedal Assist Separately
First check whether pedal assist still works. Rad's Help Center steps: read the display, rotate the throttle, isolate parts that can block the motor. 阅读详细内容…
Three black round cable connectors with brass pins on short black cables, next to needle-nose pliers and a small screwdriver on a wooden workbench.
Gotrax E-Bike Error Codes: Three Families (E02-E13, Error 21-30 and the Mustang Hex Codes)
Gotrax e-bikes use three code systems: E02 to E13, ERROR 21 to 30 on the F-series, and Mustang hex codes. Which one your bike uses and what to check first. 阅读详细内容…
A silver cylindrical metal part with small square cutouts at each end, a round splined metal socket tool, a plain steel hand tool and a thin black cable with a small black plug on a light grey windowsill bench.
Aventon Torque Sensor and Cadence Sensor Replacement: Which Bottom Bracket Fits Which Model
Aventon uses a cadence sensor or a torque-sensor bottom bracket, sold as separate parts by model. Which one your bike takes, and checks before ordering. 阅读详细内容…
Three small black electronic components with metal legs, a short bundle of colored wires ending in a white plastic connector, and a small silver pin on a light grey surface near a window.
Heybike E65 Motor/Hall Sensor Failure: Testing Before You Buy a New Motor
E65 on a Mars 3.0 or Ranger 3.0 Pro names an area, not a part. The free checks with the bike off, and what a Hall sensor test proves before... 阅读详细内容…
Close-up of an electrical wiring connector and colored cables
Rad Power Bikes Display Showing km/h Instead of mph: Where the Units Setting Is on the Advanced and Integrated Color Displays
On Rad's Advanced and Integrated Color Displays, km/h or mph is a menu setting, not a fault. Where the Units item sits on each display and what it changes. 阅读详细内容…
A single black cable with a plain black round connector at each end lies on a light grey surface by a window, next to a thin silver metal pin.
Lectric E008 Throttle Fault: The Quick Plug Check, and the XP4 Settings That Mimic a Dead Throttle
The XP4 manual lists E008 as a throttle fault with one fix: check the throttle quick plug. Then test the throttle and rule out settings that mimic it. 阅读详细内容…
A small plain black rectangular box with black wires ending in white plastic connectors lies on a light grey surface next to a small silver screwdriver.
Aventon Controller Replacement: When a Level 2, Aventure or Abound Controller Is the Real Problem
Aventon sells replacement controllers in model-specific options, such as Level 2, Aventure and Abound. What the page lists and what to rule out first. 阅读详细内容…
A pair of plain black ribbed rubber bicycle handlebar grips and a small black hex key on a light grey workbench.
Heybike Throttle Not Working: E61, Drive Mode Settings and What to Check Before Replacing It
E61 or a dead throttle on a Heybike is not always a failed part. Check the Drive Mode and Start Mode settings and loose plugs before you replace it. 阅读详细内容…
Two unplugged black round multi-pin cable connectors, a pair of black pliers and three small black zip ties on a light grey surface near a window.
Rad Power Bike Won't Turn On: A Connector-by-Connector Check Beyond the Battery
Rad's Help Center order for a bike that won't power on: rule out the battery first, then check each electrical connector one at a time. Plus our notes. 阅读详细内容…
A plain black cylindrical grip and a black brake lever, each with a short black cable and plug, lying on a light grey surface in front of a window.
Jasion EB7 and X-Hunter Error Codes 21 to 30: What Each One Points To
Jasion's EB7 and X-Hunter manuals give codes 21 to 25 and 30 two or three words each. What each may point to, and what to check before unplugging. 阅读详细内容…
Two black round multi-pin cable connectors pulled apart and facing each other on a light grey surface, with a small wooden-handled brush lying on a folded white cloth behind them.
Lectric E010 and E011 Display Communication Errors: Check the Display Quick Plug First
On the XP 3.0 and XP4, E010 and E011 are display communication errors. The manuals' first fix is the display quick plug; here is how to check it. 阅读详细内容…
Three black cables, each ending in a different unplugged connector (a small rectangular one, a round one with a ring of pins and a larger rectangular one), lie on a light grey workbench next to two small screwdrivers and a black cable tie.
Super73 Won't Turn On or Keeps Cutting Out: The Connection Checklist Super73 Wants You to Run First
Super73's own checklist before you contact support, for R, S and Z-Series bikes: reseat every connection, check the SUPER73 app, then the extra checks. 阅读详细内容…
A small black square electronic unit with a blank, switched-off dark screen stands on a light grey workbench next to a loose coil of black cable ending in a small rectangular connector and a slim silver screwdriver.
Replacing an Aventon Display: BC147, BC201, BC280 and A280 and Which Bikes Take Which
Aventon lists four replacement displays: BC147, BC201, BC280 and A280. Which bikes take which, where the parts pages stop, and how to order carefully. 阅读详细内容…
A black ribbed electronic box on a light grey desk next to two coiled black cables, each ending in a black rectangular plug, and a small silver screwdriver.
Heybike Controller Replacement: Regular Port vs 3C Port on the Mars and Cityscape
Heybike lists Mars and Cityscape controllers in Regular Port and 3C Port versions. What Heybike has published about the choice, and how to order carefully. 阅读详细内容…
Close-up of an unplugged black round multi-pin cable connector, its two halves side by side, next to a set of silver hex keys and a black zip tie on a light grey workbench.
Lectric E007 Motor Fault: Check the Motor Quick Plug and the Controller Panel Before You Replace Anything
E007 flags a motor fault, not a dead motor. Lectric's XP 3.0 and XP4 manuals start with the motor quick plug, then the wires in the controller panel. 阅读详细内容…
Hands shining a small flashlight on the pins of an unplugged multi-pin connector
How to Troubleshoot an E-Bike: Free Checks Before Parts
Most e-bike faults narrow down with checks that cost nothing: a loose plug, a sticking brake lever, a battery not fully seated. Find your symptom here. 阅读详细内容…
A bike repair stand clamp with rubber jaws gripping a black seatpost
How to Hold an E-Bike Safely for Repair: Stands, Clamps and Alternatives
Stands tip, clamps crush frame tubes full of wiring, displays snap off. Check the weight, take the battery out, then use a clamp stand or an alternative. 阅读详细内容…
A bare e-bike hub motor with its power cable on a workbench beside loose spokes
How to Change a Hub Motor: Complete Motor Wheel or Bare Motor
Confirm the motor really failed, match the new motor's measurements, then swap in a complete motor wheel or fit a bare motor into your old rim. 阅读详细内容…
Close-up of a wrench on the axle nut and washer of a rear hub motor held in the frame dropout
How to Remove and Install a Rear Hub Motor Wheel
A rear hub motor wheel has a motor cable, flat-sided axle ends, shaped washers and large axle nuts. How to take it out and refit it square and secure. 阅读详细内容…
A coiled inner tube, a tubeless valve stem, a roll of rim tape and a plain sealant bottle on a workbench
Inner Tube or Tubeless? Replacing an E-Bike Tire and Tube Together
How to tell whether your wheels run tubes or tubeless, when the tire itself needs replacing, and how to replace the tire and tube together. 阅读详细内容…
Two tire levers, a folded inner tube, a small tin and a pump hose laid out on a wooden workbench
How to Fix a Flat or Change a Tire on an E-Bike
A flat on an e-bike is the same job as on any bicycle, with a heavier wheel, stiffer tires and, on a hub motor wheel, a motor cable and big... 阅读详细内容…
Top-down view of a coiled black brake cable, a folded black inner tube, two disc brake pads, a black flat pedal and a small round white LED light on a light grey workbench.
What Rad Power Still Sells in 2026: Official Spare Parts vs. the Electrical Parts You Have to Source Elsewhere
Rad's spare-parts page is still live after the bankruptcy. What it stocks, what it leaves out, and how to source the electrical parts it does not carry. 阅读详细内容…
Left end of a plain black bicycle handlebar with a black rubber grip, a small black thumb lever clamped beside it, and a short cable ending in a small round connector, resting on a grey workbench.
Aventon Pace 500 Throttle Not Working: The Pedal-First Rule, Error 22 and When to Replace It
On a Pace 500 the throttle waits for you to pedal first. Rule out the brake cutoff, see what error 22 means, and test the throttle before replacing it. 阅读详细内容…
Black handlebar section with a brake lever on a grey rubber workshop mat, beside a coiled cable with a round multi-pin connector and a small screwdriver.
Heybike Error Codes E60-E65: What Each Code Means on the Mars 3.0 and Ranger 3.0 Pro
Heybike's Mars 3.0 and Ranger 3.0 Pro manuals list six codes, E60 to E65. What each one means and the free checks to run before assuming a part failed. 阅读详细内容…
Two black cylindrical multi-pin connectors with their pin ends facing the camera lie on a light wooden workbench beside a small black display unit with a blank, dark screen, in front of a blurred window and tool pegboard.
Lectric Error Codes Explained: E003, E006 to E011 and HOT on the XP 3.0 and XP4
Lectric's XP 3.0 and XP4 manuals list eight codes: E003, E006 to E011 and HOT. What each means and the quick plug checks to run before any new part. 阅读详细内容…
A bicycle wheel with its chain and rear sprocket raised off a wooden workbench on a metal repair stand, with a small black box trailing thin red, yellow, green, blue and black wires on the bench in front and a blurred workshop behind.
Controller Self-Learning Didn't Work? What Each Result Tells You
Some universal sine-wave controllers sold for hub-motor repairs have a self-learning function, usually started with a pair of learning wires. Instead of you matching the motor's phase and Hall wires... 阅读详细内容…
A small light-grey plastic box with a red wire and a black wire attached sits on a wooden workbench beside a clear LED with two thin metal leads and a pair of crimping pliers with a black handle, with a blurred workshop shelf behind.
Wiring a Headlight to a New Controller: Treat the Light Output as a Signal, Not Power
A controller's light output can be a signal, not a power supply, and light circuits have been damaged this way. How to check the port before you connect. 阅读详细内容…
A small dark-grey display unit with a blank, switched-off screen on a wooden workbench, joined by a thin black cable to a three-button control pad, with a screwdriver and a short length of silver metal tube blurred behind.
KT Display C Parameters: PAS Sensor Type, Current Limit and Low-Voltage Cutoff
If your e-bike has a KT-family display such as the KT-LCD3, KT-LCD5 or KT-LCD8H, its settings menu includes two numbered lists. The P list covers the motor, wheel-speed signal, assist... 阅读详细内容…
A small black electronics box on a wooden workbench with thin coloured wires at one end and a red-and-blue lead running to a loose round push-button switch, with a coiled multimeter probe beside it.
New Controller Won't Power On? Check the Key Switch Wire First
A replacement controller that stays silent is often not dead. Check the thin key switch wire first, then where the on signal comes from, step by step. 阅读详细内容…
A plain black metal electronics box on a wooden workbench with short black cables coming out of one end, two of them ending in round multi-pin connectors shown face-on, with a screwdriver and other tools blurred in the background.
Bafang OEM Controller Connectors: What Each Plug Is For and the Connection Order in Bafang's Manual
Which plug is which on a Bafang OEM controller, using the CR S307 dealer manual: the 11-pin motor plug, the EB-BUS, and the order to connect them. 阅读详细内容…
A yellow cloth tape measure looped around the tire and rim of a spoked bicycle wheel on a wooden workbench, with a small white chalk mark on the knobby black tire and two hex keys nearby.
Speedometer Wrong After a Controller Swap? Check Wheel Size and Display Settings First
Speed too high, too low or in km/h after a new controller? Check units, wheel size and the motor value (P1 or P07), then compare against GPS. 阅读详细内容…
A spoked bicycle wheel held on a grey repair stand, with a silver brake disc and black hub in focus, and black cable ties and flush cutters on a wooden workbench behind.
After the Install: Power-On Check, Brake Cutoff, and a Careful First Ride
After fitting a controller, display or hub motor: power on with the wheel off the ground, check the brake cutoff, then take a careful first ride. 阅读详细内容…
A small round metal multi-pin connector beside stripped red, black, yellow, green and blue wires, a steel hex nut and two flat washers on a grey textured rubber work mat.
Replacing the Controller on an Older Crystalyte Hub Motor: Wires, Hall Plug, Axle
When an older Crystalyte controller fails, a generic sensored controller can often replace it. What to check at the wires, the Hall plug and the axle. 阅读详细内容…
A bundle of multicoloured insulated wires running into a grey terminal block with copper contacts, lying on a worn wooden bench with a yellow tape measure, red-handled pliers and small electronic components blurred around it.
Bench-Test Your Conversion Kit Before You Install It
Lay the hub motor kit out and power it up before fitting it. What a bench test proves, the order to connect the parts, and what it cannot catch. 阅读详细内容…
A black aluminium bicycle brake lever with a thin braided metal cable ending in a black rubber boot, lying on a plain light grey surface.
Ride1Up Error Codes: What 21, 24, 25 and 30 Mean, Plus the Revv1 List
Ride1Up bikes show plain numeric error codes, but the same number does not mean the same thing on every model. Ride1Up's support site has separate pages for Error 21, 24,... 阅读详细内容…
Two unplugged black round multi-pin cable connectors, one with straight metal pins and one with a socket, with red, yellow, blue and green wires on a dark grey dimpled rubber mat.
Velotric Error Codes: The Old 21–30 Set and the New E-Series Groups
Velotric bikes show either a 21 to 30 code or a newer E-code such as E04 or E47. Which list your bike uses, what each group means, and free checks... 阅读详细内容…
A short hollow steel tube, several L-shaped hex keys and a steel ruler lying on a grey diamond-pattern rubber workbench mat.
Thru-Axle Frame? Why a Bolt-On Hub Motor Will Not Fit
A 142 mm frame can still refuse a hub motor listed for 135-142 mm. The 30-second test for a thru-axle frame, and what you can do instead. 阅读详细内容…
Plain steel washers, hex nuts, a square steel plate with a round hole and an open-end wrench lying on a worn wooden workbench.
Hub Motor Axle Washers and Torque Arms: Order, Orientation, and When You Need One
Stop pins, tabbed washers, axle nuts and torque arms hold a hub motor's torque. The correct order and orientation, and when you need a torque arm. 阅读详细内容…
Low-angle close-up of wet dark asphalt covered in small water droplets, with a blurred grey horizon in the background.
Bafang Error 26: What It Points To and What to Check First
What Bafang's manuals say error 26 points to, why a torque sensor reports two things, how 26 differs from 21, and what to check before you order a part. 阅读详细内容…
Close-up of a dusty black knobby tire with blocky tread lugs and wavy sipes, with out-of-focus gravel in the background.
E-Bike Freewheel Removal: Which Tool Fits and What Not to Force
On a hub motor e-bike the usual freewheel tool often will not even slide on. Why, how to confirm what you have, the removal steps, and what not to force. 阅读详细内容…
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Best Free Resources to Actually Learn E-Bike Repair
Where to learn e-bike repair for free, how to judge any tutorial in 30 seconds, and a simple learning path from a bike that won't turn on to a diagnosis. 阅读详细内容…
Two black multi-pin round electrical plugs on a concrete workshop floor, one facing the camera, with a digital multimeter and its red and black test probes beside them.
The Two-Bike Cross-Swap Test: Rules, Shortcuts, and One Big Risk
Swap parts with a second bike of the same kind to find a bad display, controller or motor. The rules, the shortcuts, and the one big risk to avoid. 阅读详细内容…
A small matte black rectangular electronics enclosure on a light wood bench, three thick yellow, green and blue wires leaving one end, and a separate coiled thin ribbon cable lying unplugged beside it with its white connector loose.
Sensorless Controllers: A Fix When Your Hall Sensors Fail
Hall sensors sit inside the motor, so a failed one is costly to reach. What running sensorless means, the trade-off you accept, and when it makes sense. 阅读详细内容…
A pale gravel path winding up over rolling green grassy hills toward a distant mountain ridge at sunset, with yellow and purple wildflowers and tall seed grasses in the foreground and dark conifers along the ridgeline.
Why Your E-Bike Shuts Off on Hills: Sustained Current, Not Just Voltage
Shutting off on a climb is a different fault from cutting out on a hard launch. Peak vs continuous ratings, three protections that trip, and what to do. 阅读详细内容…
A matte black plastic ring with evenly spaced raised segments around its inner edge, lying flat on a pale wood surface beside a small black rectangular sensor block whose thin cable loops once next to it.
Cadence Sensor Troubleshooting: Gap, Alignment, and Replacement
A cadence sensor is one of the cheapest parts on an e-bike and one of the most common reasons a bike feels broken when it is not. If your assist... 阅读详细内容…
A wooden hourglass with sand running on a light wooden workbench, beside an unplugged red braided cable with a black two-pin plug resting next to an empty socket set into the bench.
The 10-Minute Hard Reset That Fixes More E-Bikes Than You Think
Before buying a controller or display, try a proper hard reset. Faults that often clear, the 10-minute procedure, reading the result, and when not to. 阅读详细内容…
A coiled black branched cable harness with small round connectors on a light wooden bench, one section of its outer sheath worn through to the colored inner wires.
E-Bike Main Wiring Harness: When to Replace It and How to Choose
A failing main harness can look like a bad display, throttle or controller. Signs the harness is the problem, free checks first, and how to choose one. 阅读详细内容…
Two unplugged round multi-pin cable connectors, one with pins and one with sockets, lying apart on a matte grey surface.
KT vs No.2 Protocol: Why E-Bike Displays Aren't Interchangeable
Two displays can share a size, connector and buttons yet fail on each other's bikes. How the KT and No.2 families differ and how to tell which you have. 阅读详细内容…