Decathlon publishes per-model support pages for its Domyos bikes, and some of them explain the E-codes the console shows. The codes are model-specific: E2 on one bike is not E2 on another.
Before you use this table: Only codes with a Decathlon support page behind them are listed. For treadmills and other Domyos machines, use the model's support page on support.decathlon.co.uk.
Leading zeros, dashes and spacing do not matter: E01, E-1 and E1 find the same row.
Manufacturer-documented Meaning taken from a manufacturer manual or support page. Reported Consistent owner and technician reports; the manufacturer has not published this code. Confirm with them if it matters.
| Code | What it means | Where to look first |
|---|---|---|
| E2 (EB SEAT)Also shown as: E2, E02Domyos EB SEATManufacturer-documented | A fault with the motor that manages resistance. On a new unit Decathlon has a specific calibration procedure; otherwise it points at cables and connectors. Likely causes
Source checked 2026-09-13 |
Exercise Bike Resistance Not Working? Diagnose the Cause Before Replacing Parts → |
| E3 (EB SEAT)Also shown as: E3, E03Domyos EB SEATManufacturer-documented | A connection fault in the resistance control chain; Decathlon's E2/E3 troubleshooting checks cable and connector condition. Likely causes
Source checked 2026-09-13 |
Exercise Bike Resistance Not Working? Diagnose the Cause Before Replacing Parts → |
| Resistance codes (EB 520)Also shown as: EB 520Domyos EB 520 (self-powered)Manufacturer-documented | Decathlon's EB 520 page groups its resistance-related codes together: when one shows, or resistance does not vary, the instruction is to check the connections behind the console and under the stem. Likely causes
Source checked 2026-09-13 |
Exercise Bike Resistance Not Working? Diagnose the Cause Before Replacing Parts → |
No code matches that yet.
Code not listed? Not every brand publishes its codes, and we only list meanings we can trace. Two things help:
Sources and when they were checked
- Decathlon UK: Domyos EB SEAT support checked 2026-09-13
- Decathlon UK: Domyos EB 520 support checked 2026-09-13
Decathlon documents its machines one model at a time, on a support page for each product, and it only explains codes for some of them. Domyos does not use one code set across the range: E2 on the EB SEAT is a resistance-motor fault, while E2 on another bike may mean something else entirely or nothing at all. So this table lists only the codes that have a Decathlon page behind them, and it will grow as those pages do. Until your model is here, its own support page is the reference, and the Fault Finder works from the symptom instead.
To find that page, take the model name from the label on the frame (usually on the main tube or near the crank housing) and search it on support.decathlon.co.uk. The pages are grouped by product, so “EB 520” and “EB 520 B” are separate entries; use the exact name.
Read the console before you read the code
Domyos bikes are powered three different ways, and that decides whether a blank console is a fault at all.
Self-powered bikes such as the EB 520 and EB 520 B generate their electricity from pedalling. The console shows nothing until you have pedalled for a few seconds, so a dark screen on a bike that is standing still is normal. Decathlon’s own diagnosis for the EB 520 B starts with the small indicator light at the rear of the console: lit but no display points at the console itself; unlit points at the power path from the generator. Any resistance code on these bikes only appears once the console has power, which is why “pedal first” is the first check in the table.
Battery-powered consoles on the EB 120, VM Essential and VM E Fold rarely show a code. Their failure mode is a screen that stays blank or sits at zero, and Decathlon’s steps are fresh batteries fitted the right way round, then the connectors behind the console and where the stem meets the frame. A display that is only partly readable can clear by removing and refitting the batteries. A reading that is wrong rather than missing (kilometres instead of miles, a speed that cannot be right) is usually a configuration switch set for the wrong equipment type or unit, not hardware.
Mains-powered consoles need the adaptor the manual specifies. A plug that fits proves nothing about voltage or polarity.
Where E2 and E3 come from on the EB SEAT
The EB SEAT changes resistance with a motor rather than a cable, and E2 is the console reporting a problem with that motor’s control. On a new bike Decathlon has a calibration procedure for exactly this, which is why the table’s first check is “follow the EB SEAT page if the bike is new”. On a bike that has worked before, E2 and E3 both point at the same place: the connectors behind the console and under the stem, for seating, damage and bent pins. Those connectors are handled during assembly and disturbed by any house move, and they carry both the display and the resistance command, so one half-seated plug can produce a code and a frozen display at the same time.
Do not borrow a calibration or reset sequence from a different Domyos model. The procedures are model-specific and some of them change settings you cannot easily undo.
The most common “fault” is assembly
The pattern that comes up repeatedly across Decathlon’s own pages is not a failed part. It is a bike that has never had working resistance because a shipping spacer was left in place or the resistance cable was not installed as the assembly steps show. Decathlon’s pages for the EB 120 and the Initial Bike both tell owners to check the spacer and the cable installation before assuming a defect. If your bike has never worked properly, go back to the assembly instructions before you go anywhere near a code.
The same applies to clicks and squeaks on a new bike: Decathlon’s pages for the Domyos Challenge and the EB 120 put pedal seating, the reverse-threaded left pedal and visible hardware ahead of any internal part.
What Decathlon’s documentation leaves out
There is no cross-model code list, and some model pages exist only in French or another European language, which is one reason UK owners struggle to find them. The pages also stop at owner-level checks, which is where they should stop; if a code survives the connector and calibration checks, the next step is Decathlon rather than a screwdriver. That is easier with Domyos than with most brands, because warranty support runs through Decathlon’s stores as well as its website.
Domyos treadmills and ellipticals are not in this table yet because no Decathlon page documenting their codes has been found. If yours shows a code, send us the exact wording and the model name; it goes to the top of the research list.
Common questions
My EB 520 console is dead. Is that a code problem? Pedal for a few seconds first. If the display still stays dark, look for the indicator light at the back of the console and follow Decathlon’s EB 520 B page from there.
Is E2 on my EB 900 the same as E2 on the EB SEAT? Not necessarily. Domyos codes are model-specific. Check the EB 900’s own support page; if it does not document the code, use the Fault Finder from the symptom and tell us the code.
The resistance has never changed since I built the bike. Which code should I look for? Probably none. Check the shipping spacer and the resistance cable against the assembly instructions first.