Sedici System Readiness Error

I had something similar with my Opel Astra. 'System readiness check incomplete' usually means the car hasn't finished its internal diagnostic tests since the last reset or battery disconnect. These tests, called a 'drive cycle,' cover the oxygen sensors, catalytic converter, and EGR system. Did you clear any codes or disconnect the battery recently? That would explain it.

Yes, I cleared a fault code after reading the data. So clearing the code reset the monitors, meaning I need a complete 'drive cycle' for the system to re-evaluate everything? What's involved in a complete 'drive cycle'? Are there specific driving conditions to reset the error?

Yes, clearing the code would reset the readiness monitors. A 'drive cycle' can be very specific to each vehicle. It often involves highway driving at a steady speed, city driving, and idling. Because it's complex, I'd suggest a workshop. They can monitor the readiness status in real-time or trigger a drive cycle.

I consulted a technician, who confirmed a specific drive cycle was needed. After performing it, the system readiness check completed, and the error message cleared, at no cost. Your advice was invaluable!