804081 خطایی است که در حافظهی BMW شما ذخیره شده است (کد خطای ISTA، نه کد استاندارد P از نوع OBD-II).
یعنی چه: Drive readiness: implausible bus signal — «production/diagnostic mode, faulty». Most often appears with a weak/discharged battery, after long parking or after diagnostics; frequently self-clears. What to check: battery charge and terminals (>12.4 V with engine off); if it returns after charging — network/module diagnosis needed.
