What are the common causes of U0254?

An open, short, or corrosion in the wiring between the PCM and the remote start module. A failed remote start module. A PCM fault stopping communication. A software fault between the PCM and the module. Low battery voltage causing intermittent communication.

Check battery voltage and charging output. Inspect the wiring between the PCM and the remote start module. Update the vehicle software. Replace the remote start module if it tests faulty. Diagnose the PCM if every other module also drops out. Clear the code and retest.

U0254

Lost Communication With Remote Start Module

System: Network communication (U code)
Lamp: Check Engine Light
Category: Network Communications

What it means

U0254 means Lost Communication With Remote Start Module.

Where it lives

For U0254, start at the module the description names.

Check these first

An open, short, or corrosion in the wiring between the PCM and the remote start module
A failed remote start module
A PCM fault stopping communication
A software fault between the PCM and the module
Low battery voltage causing intermittent communication

What to do next

Check battery voltage and charging output
Inspect the wiring between the PCM and the remote start module
Update the vehicle software
Replace the remote start module if it tests faulty
Diagnose the PCM if every other module also drops out
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.