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Home/DTC Codes/Ford/Fusion/2012-2018 2.5L I4/U0243
U0243

Lost Communication with Trailer Hitch Module

2012-2018 Ford Fusion 2.5L I4

Low SeverityNetworkGeneric (SAE)

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

  1. Check hitch module fuse
  2. Test power and ground
  3. Check CAN wiring
  4. Inspect trailer connector
  5. Test trailer light outputs

Repair Notes

Check fuses and trailer connector. Corrosion at trailer plug is the most common cause.

Related Codes

U0130Lost Communication with Trailer Brake Control Module

Other Network Codes

U0243 on Other Vehicles

Ford Bronco

2021-2024 2.3L I4 EcoBoost

Ford Bronco

2021-2024 2.7L V6 EcoBoost

Ford Bronco Raptor

2022-2024 3.0L V6 EcoBoost

Ford Bronco Sport

2021-2024 1.5L I3 EcoBoost

Ford Bronco Sport

2021-2024 2.0L I4 EcoBoost

Ford Crown Victoria

1998-2011 4.6L V8 Modular 2V

Ford E-150

1997-2014 4.6L V8 Triton

Ford E-150

1997-2014 5.4L V8 Triton

Common Questions

What does code U0243 mean on a 2012-2018 Ford Fusion?

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 Ford Fusion?

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 2012-2018 Ford Fusion?

Common causes of U0243 include: Hitch module failure, CAN bus wiring, Module power loss, Fuse blown, Trailer connector corrosion.

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