DTC P0457-76: EVAP System Leak Detected (fuel cap loose/off) - Wrong mounting position: Action

NOTE:

If purge valve related DTCs are also set, perform the relevant corrective action(s) first.
It is not possible to replicate the failure event as certain entry conditions must be satisfied (for more information, refer to: Evaporative Emissions DESCRIPTION AND OPERATION . To verify the customer concern, perform routine Evaporative System Diagnostic Check and re-read DTCs.

Refer to the relevant service information and check the evaporative emissions system for leaks.
For additional information, refer to:EVAPORATIVE EMISSIONS - V6 S/C 3.0L PETROL -- XF/X260 and/or EVAPORATIVE EMISSIONS - INGENIUM I4 2.0L PETROL -- XF/X260 (DIAGNOSIS AND TESTING).