Some 2020 Mustang vehicles built on or before 23-Jun-2020 may exhibit a concern of being unable to shut off the engine. This may be due to a fault internal to the body control module (BCM). Replace the BCM to correct this condition. Refer to Workshop Manual (WSM), Section 419-10. For claiming, use causal part 15604 and any applicable labor operations in Section 10 of the Service Labor Time Standards (SLTS) Manual.