About
OBDIICSU helps drivers, technicians and researchers connect a fault code with its meaning, vehicle context and manufacturer information. The current research index covers manufacturer communications received by NHTSA across 1995–2026. Coverage is strongest for the US market and is not a global completeness claim. We retain older records for historical research and mark explicit replacement relationships when established. Use the correction form to suggest an addition or report a problem.
Updated 2026-10-27