SC333_TSB

VOLUNTARY EMISSIONS SERVICE CAMPAIGN: ENGINE CONTROL MODULE LOGIC IMPROVEMENT (SC333) - This bulletin provides information to upgrade the ‘Engine Control Module’ (ECM) system software on certain 2025MY Carnival (KA4) vehicles equipped with 3.5L GDI Lambda III engines produced from April 15, 2024 through November 27, 2024. The subject vehicles may have been produced with engine calibration that may cause the vehicle to release air pollutants that exceed Federal and California standards and cause the illumination of the Malfunction Indicator Lamp (MIL) with DTC P046100. These standards were established to protect the public health and welfare from the dangers of air pollutants.