From what I have learned recently, Onan's trouble codes are so convoluted that I would not trust them. Any particular code could be indicative of any number of things, as to make their codes useless. For example, on my generator, Code 36 indicates a shut down. Well, surprise, surprise, that code does not tell me anything, since it is readily obvious that my generator shut down unexpectedly. The moral of the story is, don't panic, the issue could be a totally different case, and not necessarily anything related to the trouble code. So, keep an open mind!