The most common thing is that the red on/off toggle switch is turned off when you are turning the truck on with the keyswitch or the keypad on the handle. I have had a few trucks get this code when trying to lift. It turned out the truck had one bad battery in the battery pack. If the truck has a battery pack with four 6 volt batteries in it you can test them one at a time with a volt meter. Leave them all connected and check the voltage right at the terminals one battery at a time while operating the lift or travel and see if the voltage drops way down. I have seen this more with the Champion/GNB sealed batteries but have also seen it with the non sealed ones. Good luck.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.