Diagnostic code: Code number obtained by accessing the diagnostic mode of the engine management computer. This code can be used to determine the area in the system where a malfunction may be there. Related posts: Personnel Management Operative Functions Administrative Role of PM Competency HR Management Role Change Personnel Policies Personnel Procedures Appealed Policies Implied Policies Specific Policies Personnel records Research Pure research Personnel research Attitude or Opinion Survey Turnover Secondary research Applied research Personnel audit Read more articles Previous PostDetonation sensor Next PostDiagnostics