Chevrolet Malibu persistent code P2645 related to rocker arm actuator control with driving hesitation on Chevrolet Malibu

Some Chevrolet Malibu owners report experiencing issues related to the persistent P2645 trouble code, which indicates a malfunction in the rocker arm actuator control circuit on bank 1 of the engine. These owners often notice symptoms such as rough idling, poor engine performance, decreased fuel efficiency, and possible stalling, along with the illumination of the Engine Light or Service Engine Soon Warning Light. The problems stem from various causes, including low or overfilled engine oil, incorrect oil type, a faulty rocker arm actuator, or poor electrical connections within the actuator circuit. Additionally, driving hesitation is commonly reported, as these issues can significantly impact engine performance and efficiency by affecting valve timing and lift. It is crucial for owners to address these concerns promptly to maintain optimal engine operation.