A recently acquired 2008 599 displayed an engine control system (ECS) error and the OBD codes revealed P0491 and P0492, Secondary Air Injection issue. The car had been started from cold the other day having sat for about a week since the last running. After a moment of warm up time and about a mile of driving, the check engine light cam on with the Engine Control System Failure (ECS) warning. The motor ran fine, no issues there. I've seen in other threads here that these codes have appeared in 8 cylinder models but I was unable to find a similar thread for the 12 cylinder cars. Has anyone else experienced this same ECS code? If so, what was done to resolve the problem? I've had no further issues since simply clearing the error codes. Thank you for your comments.