U0257: Lost Communication With Front Controls/Display Interface Module

What it means

A control module has stopped receiving expected messages from the front controls/display interface module. The code identifies the communication loss; related controls or display functions may be affected.

How it works

The front controls/display interface module combines networked functions for front controls and display features. This code sets when another module no longer receives the expected messages from that combined interface module.

Common causes

Most likely first.

1. Bus wiring open or shorted
2. Module without power or ground
3. Module failed

Symptoms

• Controls or display functions routed through the module may be unavailable
• A warning may appear depending on the vehicle

How to diagnose it

1. Save freeze-frame data and scan all modules for related communication faults to determine whether the front controls/display interface module alone is missing.
2. Check which front controls and display functions are affected, since failures in both groups can help identify the shared interface module.
3. Inspect the interface module's connectors and bus wiring for loose or corroded terminals, damaged insulation, or a wiring open or short.
4. Verify the module's power and ground circuits using the manufacturer's procedure before suspecting the module itself.
5. If its supplies are correct, test the network wiring at the front controls/display interface module for opens or shorts according to the manufacturer's procedure.

Common fixes

• Reconnect a loose front controls/display interface module connector.
• Repair damaged or corroded network wiring and terminals at the module.
• Restore the module's power or ground connection if it is missing.
• Replace the interface module if its supplies and network wiring pass checks but it still fails to communicate.

Can I keep driving?

Driving may be possible if the vehicle operates normally, but do not continue if the affected display or controls prevent you from monitoring or operating the vehicle safely. Arrange repair promptly if key front controls are unavailable.