Apollo Go: E7 error, a motor won't respond or feels locked

Your Apollo Go powers on but shows E7, and one motor won't drive, the scooter won't accelerate, or a wheel feels locked or notchy. Apollo's Go troubleshooting guide calls E7 a motor issue or overheating, and Apollo's E7 article says it is a fault reported by the motor hall sensor. Apollo's Go guide talks about front and rear motors, so the Go has two. The short answer: run Motor Detection in the app first. If E7 stays, the cause is a motor cable or connector, the motor, or the controller.

Most likely cause

Hall sensors inside the motor tell the controller where the motor is in its turn. Apollo lists the causes of E7 as a damaged or pinched motor phase or hall wire or a bad connector, a failed hall sensor or damaged magnet inside the motor, or a controller fault (E7 article). On a dual motor scooter, Apollo says one motor may still spin while the faulty one locks.

Other causes to rule out

• Heat. Apollo's Go guide says E7 can mean overheating. It gives about 100°C for the controller and about 88°C for the motor after a 20 to 25 minute ride as normal, and says a reading that jumps almost instantly, such as 23 to 100°C in under 10 seconds, points to a faulty internal sensor rather than real heat (Go guide).
• A clicking motor. Clicking under acceleration or regen braking is usually the motor shifting in the swing arm, fixed by tightening the motor screws.
• A hiss from a wheel, which Apollo says is often a failing motor bearing.
• Other codes are on Apollo's error code list.

How to confirm

1. Let the scooter cool, power off, power on and check whether E7 returns.
2. Run Motor Detection in the Apollo app, which Apollo says recalibrates the motor and checks for faults (Go guide).
3. With the power off, look along each motor cable where it leaves the axle and runs up the arm to the deck. Look for cuts, kinks or crushed spots (E7 article).
4. With the power off, turn each wheel slowly by hand. Grinding or a notchy, cogging feel that isn't the bearings points to the motor.
5. Write down which wheel misbehaves.

Fix options

Recalibrate with Motor Detection (easy)

Apollo's first step for the Go. Free, and it clears faults that came from a bad calibration.

Tighten the motor screws in the swing arm (moderate)

For clicking or clacking, Apollo's fix on the Go (Go guide).

Find whether the motor or controller is at fault (pro)

Apollo's Go guide describes swapping the front and rear motor connectors inside the deck: if the fault follows the motor, the motor is bad, and if it stays on the same connector, the controller is. That means opening the deck next to the battery and controller, so have a shop do it.

Replace the motor or controller (pro)

Apollo says to replace the motor if the fault follows it or it grinds, and the controller if the fault stays on the controller side (E7 article). Ask Apollo support for the correct part for your Go first, especially under warranty.

Parts

• Hub motor (Apollo part for the Go, front or rear)
• Controller (Apollo part for the Go)

When to get a pro

E7 after Motor Detection, a cut or crushed motor cable, grinding in a wheel, or anything that means opening the deck. See hub motor troubleshooting, motor cuts out and Apollo scooter troubleshooting.

Sources

• Go troubleshooting guide, support.apolloscooters.co
• E7 article, support.apolloscooters.co
• error code list, support.apolloscooters.co

Stuck after these checks? Find a shop near you.