🔧 What you’ll need
- Prius 2010 (Gen 3)
- Dashboard/display controls: Trip button, the speed units button (KdM/kph-mph toggle, sometimes labelled “MPH / km/h”), and “Power” button
- Car OFF and keys handy
🛠 Reset Procedure
- Turn ignition to ON (push Power button twice without pressing the brake so the vehicle is in “ON” electronics mode, but the engine should not start).
- On the dash, press the Trip button (often on the steering wheel) to cycle displays until you see Trip A.
- Once “Trip A” is showing, turn the car off (Power button, no brake).
- Now, press and hold the MPH / km/h button (speed unit toggle) while pressing the Power button twice (again, no brake) to reach the “ON” electronics mode. Keep holding the MPH / km/h button.
- Keep holding that MPH / km/h button until you see on the display something like “Reset in progress…” or the indicator gradually reset to zero / dash / back to normal. The message will eventually say “Reset complete.” Once that shows, the maintenance light should go dark.
⚠️ Tips & Common Gotchas
- Make sure you don’t press the brake pedal during the reset sequence: brake = start engine or other unwanted modes messing up the reset.
- Ensure “Trip A” is displayed when you attempt Step 4, or it may not work.
- Sometimes people confuse “Maintenance Required” / “OIL MAINT REQD” light with a Check Engine light; this procedure resets the maintenance reminder / oil change reminder not engine fault codes.
- If the Trip or MPH / km/h buttons are not working (broken, stuck, etc.), reset might not work via this method. Some users resort to dealership tech tools or using Toyota’s TechStream diagnostics.
If you want, I can send you a visual or video link so it’s even easier! Want me to grab that for you?