Inspect traffic condition, driving habit, vehicle condition, external circumstances etc.

Inspect engine hesitation, poor power, poor acceleration etc.

Inspect "Basic inspection".

Click on "Fuel" item and inspect fuel quality.

If fuel quality is normal, click on each possible causes item for more details.

▶ Click on "Engine oil" item for more details.

▶ Click on "Tire and Tire pressure" item for more details.

▶ Click on "Air cleaner" item for more details.

If all components are normal, perform "Suspected cause inspection" as below.