My Digital Garage

Vehicle Health & Performance Tracker

Free resource — no account needed.

Free record-keeping template for organizing observed vehicle information. It does not diagnose the vehicle, replace manufacturer service information or establish that a component is good or bad.

26 columns including mileage, scan phase, codes observed, readiness monitors, battery voltage, fuel trims, tire pressures, observations and verification status. Measurements are recorded only — the template never labels a value good or bad, because acceptable specifications vary by vehicle and operating conditions.