When on cruise control can’t speed up

Hello, what are you using to increase the speed? Are you using the "ACCEL" button, or are you using the accelerator pedal? If you are not using the button, it's going to cause troubles. Use the button. If that causes issues, see a local shop near you to assess. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops