Electric scooters.
We have documented 116 electric scooters fault codes from published technical sources. 38 of them (33%) also carry the cause, not just the meaning. The most frequent subjects are the battery, the motor, wiring and communication. On 10 codes the same code means different things depending on the brand — always check yours.
Most frequent fault codes
Each code below comes from a published source, with the cause and the check to run. We never invent a cause we cannot document.
| Code | What it means | Cause & what to check |
|---|---|---|
| E1 Apollo | Controller communication error | Controller malfunction or wiring issue |
| E2 Apollo | Brake sensor error | Brake lever sensor stuck or damaged |
| E3 Apollo | Motor communication error | Motor hall sensor malfunction |
| E4 Apollo | Throttle signal error | Throttle sensor malfunction |
| E5 Apollo | Battery communication error | Battery management system issue |
| E6 Apollo | Overcurrent protection | Controller detecting abnormal power draw |
| E7 Apollo | Motor hall sensor failure | Motor sensor wiring issue |
| E8 Apollo | Controller overheating protection | Controller temperature limit exceeded |
| E1 Dualtron | Controller communication error | Controller malfunction or wiring issue |
| E2 Dualtron | Brake sensor error | Brake lever sensor stuck or damaged |
| E3 Dualtron | Motor communication error | Motor hall sensor malfunction |
| E4 Dualtron | Throttle signal error | Throttle sensor malfunction |
| E5 Dualtron | Battery communication error | Battery management system issue |
| E6 Dualtron | Overcurrent protection | Controller detecting abnormal power draw |
| E7 Dualtron | Motor hall sensor failure | Motor sensor wiring issue |
| E8 Dualtron | Controller overheating protection | Controller temperature limit exceeded |
| E1 Gotrax | Controller communication error | Controller malfunction or wiring issue |
| E2 Gotrax | Brake sensor error | Brake lever sensor stuck or damaged |
| E3 Gotrax | Motor communication error | Motor hall sensor malfunction |
| E4 Gotrax | Throttle signal error | Throttle sensor malfunction |
| E5 Gotrax | Battery communication error | Battery management system issue |
| E6 Gotrax | Overcurrent protection | Controller detecting abnormal power draw |
| E7 Gotrax | Motor hall sensor failure | Motor sensor wiring issue |
| E1 Hiboy | Controller communication error | Controller malfunction or wiring issue |
| E2 Hiboy | Brake sensor error | Brake lever sensor stuck or damaged |
| E3 Hiboy | Motor communication error | Motor hall sensor malfunction |
| E4 Hiboy | Throttle signal error | Throttle sensor malfunction |
| E5 Hiboy | Battery communication error | Battery management system issue |
| E6 Hiboy | Overcurrent protection | Controller detecting abnormal power draw |
| E7 Hiboy | Motor hall sensor failure | Motor sensor wiring issue |
| E1 Kaabo | Controller communication error | Controller malfunction or wiring issue |
| E2 Kaabo | Brake sensor error | Brake lever sensor stuck or damaged |
| E3 Kaabo | Motor communication error | Motor hall sensor malfunction |
| E4 Kaabo | Throttle signal error | Throttle sensor malfunction |
| E5 Kaabo | Battery communication error | Battery management system issue |
| E6 Kaabo | Overcurrent protection | Controller detecting abnormal power draw |
| E7 Kaabo | Motor hall sensor failure | Motor sensor wiring issue |
| E8 Kaabo | Controller overheating protection | Controller temperature limit exceeded |
| 20 1 Nami | Rear motor error | — cause not yet documented |
| 20 2 Nami | Front motor error | — cause not yet documented |
What actually breaks
Counted on the 116 codes on this page, not estimated.
| subject | codes | share |
|---|---|---|
| the battery | 34 | 29% |
| the motor | 33 | 28% |
| wiring and communication | 26 | 22% |
| the controller | 23 | 20% |
| the speed sensor | 20 | 17% |
| the brake cut-off | 13 | 11% |
| the throttle | 13 | 11% |
| overheating | 6 | 5% |
The parts that fail
The components behind the codes above: pump, heating element, seal, filter.
Brands covered
Frequently asked questions
Answers counted on our own data, with the sources cited at the bottom of the page.
What is the most common electric scooters fault code?
In our data the code that appears on the largest number of brands is E1. On Apollo it means: Controller communication error
Does the same code mean the same thing on every brand?
No, and this is the single most useful thing to know. We found 10 codes that appear on two or more brands with different meanings. For example E1: on Apollo it means «Controller communication error», on Dualtron it means «Controller communication error».
What goes wrong most often on a electric scooters?
Counting the causes we documented: the battery (29%), the motor (28%), wiring and communication (22%), the controller (20%). This is what the codes actually describe.
Which brands are covered?
For electric scooters we currently document codes for: Xiaomi, Segway, Teverun, Apollo, Dualtron, Kaabo, Gotrax, Hiboy, Pure, Nami. The list grows as we verify new sources.
How reliable is that motor, that battery, that brand?
Beyond fault codes and technicians, we rate the reliability of motor systems, batteries and brands — a transparent score that owes nothing to the manufacturers.