TECHNICAL SERVICE BULLETIN: SERVICE ACTION: 3.5L GDI ECM LOGIC IMPROVEMENT (SA508) - This bulletin provides the procedure to update the software logic of the Engine Control Module (ECM) on some 2023MY Carnival (KA4) vehicles produced from March 24, 2022 through July 14, 2022, that may experience a temporary, lower than expected engine speed while decelerating or idling, while applying torque converter dampening.
