U0130moderate severityNetwork
Lost Communication with Trailer Brake Control Module
on 2018 Tesla Model 3 Standard Range Plus Single Motor RWD · RWD
What this code means
Cannot communicate with the integrated trailer brake controller.
Symptoms
- Trailer brake warning light
- Trailer brakes not functioning
- Trailer brake gain not adjustable
- Towing mode limited
Common causes
- Trailer brake module failure
- Trailer wiring issue
- CAN bus wiring
- Module power loss
- Fuse blown
Diagnostic steps
- Check trailer brake module fuse
- Test module power and ground
- Check trailer connector wiring
- Inspect CAN wiring
- Test trailer brake output
Repair notes
Check trailer wiring connector first. Verify factory trailer brake module power supply.
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
✓ ANCEL official store
Serious DIY~$100
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
SHOP FAVORITEShop-grade tablet~$300
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
Other Network codes on this vehicle
U0001
High Speed CAN Communication Bus
U0002
High Speed CAN Communication Bus Performance
U0003
High Speed CAN Communication Bus (+) Open
U0004
High Speed CAN Communication Bus (+) Low
U0005
High Speed CAN Communication Bus (+) High
U0006
High Speed CAN Communication Bus (-) Open
U0007
High Speed CAN Communication Bus (-) Low
U0008
High Speed CAN Communication Bus (-) High
U0009
High Speed CAN Communication Bus Shorted Together
U0010
Medium Speed CAN Communication Bus