Fault Codes/Multiquip/80Multiquip80UnclassifiedGeneralWhat This Code MeansSevere engine damage; Engine automatically shuts downPossible Causes•Filling the exhaust fluid tank with anything other than Diesel Exhaust Fluid•Engine fault conditionsSuggested Actions1View the indicated fault shown on the LCD screenRelated Multiquip Fault Codes81-1 UNDFREQ ALARM81-2 OVRFREQ ALARM59P-1 OVRVOLT ALARM787251-2,5,6 OVRCURR ALARM787351-1,3 OVRCURR PREALARM787440Q-1 EXC LOSS PREALARM787532-3 KW OVRLD PREALARM7940Browse all Multiquip fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 80 on your specific Multiquip unit — cited to the OEM manual, not a forum guess.TRY IT FREE