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

WARNING: This page is about a different car, the 2015 Jaguar XF, 2014 Jaguar XF, and 2013 Jaguar XF. However, it is still accessible from the selected car via links, so may be relevant.

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 section of the service information and check the evaporative emissions system for leaks. For additional information, refer to Evaporative Emissions - DIAGNOSIS AND TESTING .