Lost Communication with Trailer Hitch Module
2021-2024 Dacia Spring Electric 🇩🇪
Description
Cannot communicate with the integrated trailer hitch control module.
Symptoms
- Trailer lights not working
- Trailer brake output disabled
- Tow/haul mode limited
- Trailer sway control disabled
Common Causes
- Hitch module failure
- CAN bus wiring
- Module power loss
- Fuse blown
- Trailer connector corrosion
Diagnostic Steps
- Check hitch module fuse
- Test power and ground
- Check CAN wiring
- Inspect trailer connector
- Test trailer light outputs
Repair Notes
Check fuses and trailer connector. Corrosion at trailer plug is the most common cause.
Related Codes
Other Network Codes
- U0001High Speed CAN Communication Bus
- U0002High Speed CAN Communication Bus Performance
- U0003High Speed CAN Communication Bus (+) Open
- U0004High Speed CAN Communication Bus (+) Low
- U0005High Speed CAN Communication Bus (+) High
- U0006High Speed CAN Communication Bus (-) Open
- U0007High Speed CAN Communication Bus (-) Low
- U0008High Speed CAN Communication Bus (-) High
- U0009High Speed CAN Communication Bus Shorted Together
- U0010Medium Speed CAN Communication Bus
U0243 on Other Vehicles
Dacia Bigster
2025-2025 1.2L I3 Turbo TCe 130
Dacia Bigster
2025-2025 1.6L I4 Hybrid 155
Dacia Duster
2017-2024 1.0L I3 TCe
Dacia Duster
2017-2024 1.3L I4 TCe
Dacia Duster
2017-2024 1.5L I4 dCi
Dacia Duster
2024-2025 1.0L I3 TCe 100 LPG
Dacia Duster
2024-2025 1.2L I3 Hybrid TCe 130
Dacia Duster PL
2018-2025 1.0L I3 Turbo TCe 100
Common Questions
What does code U0243 mean on a 2021-2024 Dacia Spring?
U0243 stands for "Lost Communication with Trailer Hitch Module". Cannot communicate with the integrated trailer hitch control module.
What are the symptoms of U0243 on a Dacia Spring?
Common symptoms of U0243 include: Trailer lights not working, Trailer brake output disabled, Tow/haul mode limited, Trailer sway control disabled.
What causes U0243 on a 2021-2024 Dacia Spring?
Common causes of U0243 include: Hitch module failure, CAN bus wiring, Module power loss, Fuse blown, Trailer connector corrosion.