Turn observations into a shop-ready checking order.
Add the exact vehicle context, multiple codes and symptoms, when the concern occurs, and recent work. The result screens urgent conditions and orders reviewed checks before any possible repair. It never diagnoses a vehicle or asks for a VIN.
Important limits
A vehicle can have more than one fault, and the same code can have several causes. Configuration data is context, not proof that a generic decision path applies to an exact build. Stop driving whenever braking, steering, fuel leakage, overheating, oil pressure, severe knocking, smoke, fire, or restraint-system behavior makes the vehicle unsafe.