odometer on 1991 Cadillac Fleetwood

my odometer is showing error and the information center is showing ccr. what is ccr and how can i fix that and my odometer?

Asked by for the 1991 Cadillac Fleetwood
CCR is the acronym Cadillac use for computer controlled suspension. Your instrument panel is displaying it sees a fault in the computer controlled system that needs to be investigated.