Fault Codes/Rehlko/ECM COMM ERR SHUTDWNRehlkoECM COMM ERR SHUTDWNUnclassifiedGeneralWhat This Code MeansECM communications lossRelated Rehlko Fault CodesECM MISMATCH SHUTDWNECMMISMATCH SHUTDWNECM ADDR ERR SHUTDWNEMERGENCY PUSH BUTTON ENGAGED FAULTCONCHECKINGEMERGENCY STOPCOMMON WARNGESCOMMON FAULT SHUTDWNEXER NOT SCHCHKNGMETEREXER NOT SCH WBrowse all Rehlko fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for ECM COMM ERR SHUTDWN on your specific Rehlko unit — cited to the OEM manual, not a forum guess.Your question about ECM COMM ERR SHUTDWNGET THE ANSWERFree account required — we'll bring your question with you.