The contact owns a 2020 Honda Accord. The contact stated while driving at various speeds, the vehicle lost motive power. The check engine warning light and other unknown warning lights were illuminated. Additionally, messages indicating an emission and TPMS failure, and other unknown messages were displayed. The contact was able to pull over to the side of the road. The vehicle was able to be restarted. The contact was able to continue driving; however, the failure recurred after driving for several miles, causing the contact to pull over to the side of the road several times. The contact stated that a mobile mechanic had replaced the spark plugs and the ignition coils several times; however, the failure persisted. The vehicle was taken to the dealer, where it was diagnosed that the head gasket had failed and needed to be replaced. The vehicle was not repaired. Additionally, the contact stated that the passenger’s side air bag warning light was illuminated intermittently. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was unknown.