TSB: Some 2021 ? 2024 model year ES 250 and 2022 ? 2024 model year NX 250 vehicles with A25A-FKS engines may have a MIL ON condition with one or more of the following Diagnostic Trouble Codes (DTCs) upon cold soak start up with engine coolant temperatures between 14°F ? 41°F:
?P030027 ? Random/Multiple Cylinder Misfire Detected (Emission) Signal Rate of Change Above Threshold
?P030000 ? Random/Multiple Cylinder Misfire Detected
?P030100 ? Cylinder 1 Misfire Detected
?P030200 ? Cylinder 2 Misfire Detected
?P030300 ? Cylinder 3 Misfire Detected
?P030400 ? Cylinder 4 Misfire Detected
Follow the Repair Procedure in this bulletin to address these conditions.
