Tank system, test result = "Major leakage found"

Diagnostic trouble code limit: Tank pressure lower than 1500 Pa after 450 seconds in test phase "Major leakage".

Check that the tank cap is properly fitted and that its seal is undamaged.
Check the hoses and connections on the leak diagnostic unit, the canister, EVAP-valve and the fuel filler pipe visually. Check for damage or incorrect/loose installation.
Remedy as necessary.
Restart the test.
NOTE:
Problems caused by a loose tank cap or loose hose connections may be difficult to find. If no leakage was found in the quick-test of the tank system after completed checks and actions according to the above, the problem has likely been repaired.