Accu-Chek Guide Link Error codes Hi Blood glucose may be higher than the measuring range of the system.See the "Unusual Blood Glucose Results" section in the user manual. Battery icon Battery The batteries are almost out of power. Lo Lo Blood glucose may be lower than the measuring range of the… E-3 A meter or a test strip error has occurred or in rare cases,… E-4 E-4 Not enough blood was drawn into the test strip or was… Blank The meter will not turn on or the display is blank Err The meter was unable to pair with a mobile device. Memory There are no test results in range for the selected data. USB The meter is connected to a PC and a blood glucose or control… E-14 An electronic error has occurred. E-13 Fluid or foreign material may be present in the test strip… E-12 Your blood sample may contain a high level of ascorbate. E-11 The test strip may be damaged. E-10 The time and date setting may be incorrect. E-9 The batteries may be out of power. E-8 The temperature is above or below the proper range for the… E-7 An electronic error occurred. E-6 Blood or control solution was applied to the test strip before… E-1 The test strip may be damaged, not properly inserted, or was… View all error messages