What Does EPO or CPE Mean on My Garmin Fitness Device?

Some Garmin fitness devices will list a section under the About screen labeled either EPO or CPE along with a status of either Current or Expired. To explain, there are files used by the watch to predict where the GPS satellites are located in the sky at any given moment. Current EPO or CPE files will allow the device to acquire a signal faster when you are going to record an outdoor activity such as a run or ride. Expired files will result in a much slower time frame before the device determines its current location.

To keep this information up to date you simply need to sync your device with either the Garmin Connect app on a phone or Garmin Express on a personal computer.

Refer to your Owner's Manual for help finding the About menu of your device.