What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer communications
1Original wording in English
HARLEY-DAVIDSON
Reported code forms U040000
SERVICE BULLETIN M1720 (REV A): PAN AMERICA ELECTRONIC CONTROL MODULE (ECM) UPDATE. PURPOSE: Initial release 3/3/2026. Revision A. 3/30/2026. Updated: Purpose for Service Bulletin and Required Dealer Action. Adjust…
Check vehicle applicability
12A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Harley-Davidson | RA1250 | 2024 |
| Harley-Davidson | RA1250 | 2023 |
| Harley-Davidson | RA1250 | 2022 |
| Harley-Davidson | RA1250 | 2021 |
| Harley-Davidson | RA1250S | 2025 |
| Harley-Davidson | RA1250S | 2024 |
| Harley-Davidson | RA1250S | 2023 |
| Harley-Davidson | RA1250S | 2022 |
| Harley-Davidson | RA1250S | 2021 |
| Harley-Davidson | RA1250SE | 2025 |
| Harley-Davidson | RA1250SE | 2024 |
| Harley-Davidson | RA1250ST | 2025 |
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.