U055E: Invalid Data Received From Front Controls Interface Module B

What it means

A receiving control module has detected invalid data from Front Controls Interface Module B. The code does not specify which data is invalid or why.

How it works

Front Controls Interface Module B communicates front-control status or commands to other vehicle modules. U055E is stored when a receiving module gets data from this specific interface module but judges it invalid; it does not identify which control or data item is involved.

Common causes

Most likely first.

1. Module internal fault or sensor input drift
2. Software version mismatch after replacement
3. Gateway module routing CAN messages incorrectly

Symptoms

• Multiple warning lights may illuminate
• Affected modules may go into limp mode or shut down
• Specific functions inoperative depending on module
• Diagnostic tools may show communication faults

How to diagnose it

1. Scan every module and record freeze-frame data and communication codes to find which receiver flagged Front Controls Interface Module B.
2. Check whether the code returns and note any front-control functions that fail at the same time, such as controls integrated into the vehicle's front interface.
3. Inspect Module B's connectors and nearby harness for looseness, corrosion, pin damage, or chafing.
4. Verify the module's power, ground, and network connections against the vehicle wiring information and manufacturer's specification.
5. Check for gateway routing, configuration, or software mismatch, particularly after a module replacement or programming event.
6. If the network and setup check out, use vehicle-specific diagnostics to evaluate Module B's inputs and internal operation.

Common fixes

• Secure or repair a loose or damaged Front Controls Interface Module B connector.
• Repair damaged harness wiring or restore a poor power or ground connection.
• Correct gateway routing or module configuration errors.
• Install the correct software or programming for the vehicle if a mismatch is confirmed.
• Repair or replace Front Controls Interface Module B if its inputs or internal operation fail testing.

Can I keep driving?

The code's effect depends on which front controls use Module B; it does not by itself indicate an engine problem. Do not rely on a front-control function that is behaving erratically, especially one needed for visibility or vehicle operation.