Start with the question
Keeping a diagnostic-code record starts with the original document, not a guessed conclusion. A diagnostic-code record is an observation, not a repair verdict. The code alone does not prove that a named part is faulty or tell a reader what work should be performed. The Gasketfern reading file focuses on recorded code; observation context; diagnostic limitations. Keep the document name, issuing organization, relevant version and the passage you are trying to understand together. A short note can help distinguish a statement in the source from an assumption added while reading. Do not upload personal records to this site; this is a public reading guide, not a review service.