B0090 0F

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The SDM received a fault present message from the ROS.
The ROS is in assembly plant mode and the SDM is in production mode.
The SDM has not received any data from the ROS.