Hello, I have an 06 Aurion GSV40R. I've been having issues with the Check VSC system error popping up, it'll pop up and then go away for a few days then come back. I've hooked a cheap scanner to the car and it just reports that the system is too lean on bank 1. Anyhow, I've been using premium 95 fuel for the last week and the error code hasn't come back. What could be going on here?