Speedometer not working

The most common failure item is the vehicle speed sensor, but to start diagnosing this properly you will need to retrieve codes from the power-train control module and the instrument cluster module, then go from there.

Here is how you get he codes to confirm the failure. The output speed sensor is "A" on the diagrams.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please run down this guide and report back.