Apollo scooter troubleshooting: error codes, flats, brakes and stem checks

This page covers common problems on Apollo electric scooters, including the Go, Air, City, Explore, Pro and Phantom. Steps differ by model and year, so check anything below against the guide for your exact scooter.

Before you start

• Find your model and serial number. The CPSC recall notice for the City 2024 says the serial number is on the bottom of the deck, and the Apollo app can also help you find it.
• Get the manual for your scooter, like the Apollo Phantom manual.
• Apollo says to power off first before you inspect anything (Apollo sudden stop guide).

Common problems and what to check

Scooter won't turn on or cuts out

1. Unplug the charger completely. Apollo notes some models will not power on while charging (Apollo sudden stop guide).
2. Clean the power button and throttle, then hold the power button for about 10 seconds to reset, as the same guide describes.
3. Open the Apollo app and look for error codes or calibration prompts, and check for a firmware update.
4. Make sure the throttle springs back on its own.

Checks inside the deck or handlebar are for a pro. More help: motor cuts out.

Won't charge

• Seat the charger plug fully. On the Go, solid green or red charger lights are normal and flashing red or yellow means a faulty charger (Apollo Go guide).
• The Phantom manual says not to leave the scooter plugged in for long periods.
• Use only chargers sold or approved by Apollo, as the Phantom manual says.
• If the charger light never turns green after a full charge, Apollo's E5 guide points to testing or replacing the charger, and says a battery that stays low may need service.

See battery won't charge and check your charger.

Brakes weak, rubbing or showing E1

• If E1 shows at power on, Apollo says to push the brake handle fully back to neutral and check that wires are not pinched after a handlebar adjustment (Apollo Go guide).
• Apollo's E1 guide says to look along the lever wiring for kinks, cuts or bare wire, and to check the connector for bent pins, moisture or corrosion. It notes the mechanical brake should still work but regen braking may not, so do not rely on regen while E1 is showing.
• The Phantom manual explains tightening the brake with the handle's adjustment screw, says some rubbing during break in is normal, and suggests new brake pads after 300 miles.

More on brakes.

Flats and tires

Many Apollo models use tubeless tires. Apollo's tubeless tire guide says:

• Find leaks with soapy water.
• Replace a punctured tire rather than patching it. A plug may only be a temporary fix.
• Tighten or replace a leaking valve core.
• Inflate to the pressure on the tire sidewall and recheck after 24 hours. The included hand pump is for top ups, not for seating a flat tubeless bead.

The Phantom manual gives 50 PSI for that model. Check your own sidewall or manual. See set tire pressure, tubeless tires and sealant and fixing a flat.

Stem wobble or folding feels loose

• Learn the fold and unfold steps for your model. The Phantom manual covers the safety ring, pin and latch.
• Apollo's folding mechanism adjustment guide covers adjustment by model, warns against overtightening, and says to fold and unfold several times, confirm the latch snaps firmly, and check for play before you ride.
• If the stem still feels loose after adjustment, Apollo says to stop riding and have the mechanism inspected for wear.
• On the Go, slight front wheel play is normal, according to the Apollo Go guide.

Water and rain

The Phantom manual calls the scooter water resistant but not waterproof. It handles light rain and wet roads, not long or heavy exposure, and water damage is not covered by warranty. No IP rating is stated in the sources used here, so check your manual. Apollo suggests drying the scooter after wet rides (Apollo sudden stop guide). See e-bike got wet.

Recalls

• Apollo City 2024: CPSC announced a recall on July 24, 2025 for a weld that can crack and let the stem break. It covers serial numbers 4202240300001 to 4202240301236 and 4202240400001 to 4202240400764. Stop riding an affected scooter and request the free replacement stem as the CPSC notice explains.

Error codes

From Apollo's error code list. Codes differ by model and display, so check the app too.

• E1: brake sensor circuit fault.
• E2: throttle sensor circuit fault.
• E3: communication fault, usually between the handlebar and the controller.
• E4: power loss or motor cutout.
• E5: low battery or battery undervoltage protection.
• E7: motor hall sensor fault. On the Go, Apollo suggests running Motor Detection in the app (Apollo Go guide).

More on error codes.

Official help

Apollo's folding mechanism articles and the guides linked above are the best starting points. For general upkeep, see e-scooter maintenance.

Videos

When to get a pro

• Error codes that come back after a restart.
• Anything inside the deck, the battery, the controller or the handlebar harness.
• A stem or latch that stays loose after adjustment.

Sources

• Error codes, Apollo Scooters
• E1 error code, Apollo Scooters
• E5 error code, Apollo Scooters
• Troubleshooting sudden stops, power cut offs and no acceleration, Apollo Scooters
• Apollo Go troubleshooting and maintenance guide, Apollo Scooters
• Troubleshooting tubeless tire issues, Apollo Scooters
• Apollo Phantom user manual, Apollo Scooters
• Folding mechanism adjustment guide, Apollo Scooters
• Folding mechanism articles, Apollo Scooters
• Apollo recalls electric scooters due to fall and injury hazards, CPSC

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