Cadillac
U0100loss of communications with ECMThe wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
U0100loss of communications with ECMU0100-00Lost Communication With ECM/PCMU0100Lost Communication With ECM/PCMU0100Lost Communication With ECM/PCMU0100-00Lost Communication With ECM/PCMU0100-00LOST COMMUNICATION WITH ECM/PCMU0100-00Lost Communication with Engine Control Module (ECM)U010087Lost Communication with ECM/PCM "A" Missing MessageU0100Lost Communication · Ambient Air Temperature (AAT) improvementsU0100Lost Communication With ECM/PCMU0100Lost Communication With ECM/PCM)U0100-00Lost Communication With ECM/PCMU0100Lost Communication with ECM/PCM “A”"