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U0100-00-Lost Communication With ECM/Pcm "A"

NOTE:

The Scan Tool may display the description name of this Diagnostic Trouble Code differently with the following below:

U0100-00-LOST COMMUNICATION WITH ENGINE CONTROL MODULE (ECM) / POWERTRAIN CONTROL MODULE (PCM)

The COMMUNICATION DIAGNOSTIC PROCEDURE MUST  be performed before replacing any component(s) or module(s). Perform the COMMUNICATION DIAGNOSTIC PROCEDURE. Refer to COMMUNICATION DIAGNOSTIC PROCEDURE .

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