Buick Terraza starting disabled with reduce engine power warning and requires positive cable disconnection to restart on Buick Terraza

Some Buick Terraza owners report experiencing a "starting disabled" message accompanied by a "reduced engine power" warning, indicating serious issues that require immediate attention. These warnings suggest potential problems with the vehicle's starting or security systems, and while disconnecting the positive cable may temporarily reset the system, it is not a permanent solution. Owners are advised to safely pull over, turn off the engine, and wait before attempting to restart. If the warning persists, it is crucial to have the vehicle inspected by a qualified mechanic to prevent further damage. Additionally, if the issue reoccurs immediately after restarting, it signals a genuine problem that is typically not DIY-friendly. A diagnostic trouble code (DTC) is set when the engine enters reduced power mode, which can be identified with a scanner. Understanding and addressing these warning lights promptly is essential to avoid further complications.