On a small number of school buses, there may be a software problem with the engine control module. As a result, the engine power may not be reduced when certain safety systems activate, like the traction control system or collision avoidance system.
Safety systems that do not work properly could increase the risk of a crash.
Cummins will notify owners by mail and instruct you to take your bus to a Cummins authorized service center to update the engine control module software.