Heybike e-bike troubleshooting: common problems, error codes and safe checks

This page covers common problems on Heybike e-bikes such as the Mars, Ranger, Cityrun, Brawn, Tyson, Horizon, Hauler and Hero. They use hub motors, so our hub motor guide applies too. Checks run from easiest to hardest, with notes on when Heybike support or a shop should take over.

Before you start

• Find your model name. Heybike's error code article lists which models each code applies to, so you need the name to read it correctly.
• Learn your battery key positions. Heybike describes three: position 1 is on and locked, position 2 is off and locked, and position 3 is off and unlocked, so the battery can come out and the key can be removed (Heybike battery help).

Common problems and what to check

Bike won't turn on

Heybike's battery help and common problems table suggest working through these in order:

1. Charge the battery fully.
2. Make sure the battery is fully seated, its switch is on and the key is in the on position.
3. Long press the battery's own power button to see its charge display. Heybike says a battery that shows nothing here may need replacing.
4. Make sure neither brake lever is stuck on. Heybike lists engaged brakes as one cause of a bike that won't power on.
5. Look at the plugs between the battery cable, controller and main cable to see they are fully pushed together and the pins look clean.

Still dead? Heybike asks for a short video and your order number, and also names a battery fuse as a possible cause. Leave the fuse to support or a shop. See e-bike won't turn on.

Battery won't charge

• Read the charger light. Heybike says green at the outlet means the charger has power, and red once connected to the battery means charging has started (Heybike battery help).
• Check the outlet, cord and plug for damage or a loose fit, and try another outlet.
• If the light goes off or blinks red when you plug into the battery, Heybike says the battery may be aging or have an internal fault. Try once more, then contact support.
• If the light stays green but the battery is not full, contact support. Heybike says this can point to the battery's fuse or an internal problem.

Motor won't respond, cuts out or feels weak

• Charge fully first. Heybike lists low battery as a cause of erratic acceleration and lower top speed (common problems).
• Squeeze and release both brake levers. Code 25 means the bike thinks a brake is on, so make sure both levers return fully (error codes).
• Check that the throttle springs back and its cable is not pinched or cut.
• With the battery off, look at the motor cable where it leaves the hub for damage, and check it is plugged in fully.
• Heybike also lists a misaligned or damaged magnet ring as a cause of erratic speed. If the checks above don't help, have a shop look at it.

More help is in motor cuts out, no pedal assist and throttle not working.

Range has dropped

Heybike points to low tire pressure, rubbing brakes and an aged or long discharged battery (common problems). Check tire pressure and brake rub first, then contact support if range keeps falling. See battery drains fast.

Brakes rub, squeal or feel soft

Heybike's brake help covers three cases:

• Rubbing with the brakes off: check the wheel is installed correctly, spin it and look for a bent rotor. A bent rotor gets replaced. Otherwise the caliper can be re-centered over the rotor using its two mounting bolts.
• Harsh noise when braking: often oil or grime on the rotor and pads. Heybike suggests cleaning with alcohol or a degreaser.
• Soft lever and weak braking: check pad wear and replace badly worn pads. Heybike notes hydraulic brakes may also need fluid.

Noises from the wheel or motor

Heybike names loose or damaged spokes or rim and loose motor wiring (common problems). See check spokes and wheel true and e-bike noises.

Error codes

These come from Heybike's error code article. Code 25 applies to the Cityrun, Brawn, Tyson, Ranger S, Horizon, Mars 2.0, Hauler and Hero. The rest apply to all the models listed at the top of this page.

• 21: abnormal current
• 22: throttle error
• 23: motor phase loss
• 24: abnormal hall sensor signal
• 25: brake fault
• 30: communication error between display and controller

For every code, Heybike's first step is checking the related plugs and wires for poor connections, bent pins or damage. Past that, its steps mean swapping parts such as the PAS sensor, throttle, controller or motor, so contact support or a shop. See also e-bike error codes.

Official help

Heybike's help center articles listed under sources cover battery, brakes, error codes and common problems. For anything else, contact Heybike support with your model, order number and a short video.

When to get a pro

• A battery that won't charge, won't wake or shows any damage, and any fuse checks.
• Codes 23, 24 and 30, or any code that comes back after you have checked the plugs.
• Replacing a controller, throttle, PAS sensor or motor.
• Hydraulic brake bleeds and truing the motor wheel.

Sources

• Error codes, Heybike help center
• Battery, Heybike help center
• Brakes, Heybike help center
• Other common problems, Heybike help center

Stuck after these checks? Find a shop near you.