Conditions for Setting the DTC

WARNING: This page is about a different car, the 2009 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.

DTC B0000 5A will set when one or both of the following conditions are present:

Vehicle speed from serial data is more than 5 km/h (3 mph) and vehicle speed pulse from the ECM is 0 km/h (0 mph).
Vehicle speed calculated from the navigation processing software is more than 36 km/h (22 mph) and vehicle speed pulse from the ECM is 0 km/h (0 mph) for 10 seconds continuously.