What would cause the odometer to show error on a 2002 rendezvous?

An odometer error on a 2002 Buick Rendezvous could be caused by a malfunctioning speed sensor, which measures the vehicle's speed and sends data to the odometer. Additionally, issues with the vehicle's wiring or connectors, as well as a faulty instrument cluster, could lead to inaccurate readings. Low battery voltage or a failing instrument panel can also contribute to odometer discrepancies. Regular maintenance and timely repairs can help prevent these issues.