Accu-Chek Instant Error codes E-12 Your blood sample may contain a high level of ascorbate.Contact your healthcare professional. Lo Blood glucose may be lower than the measuring range of the… USB The meter is connected to a PC and a blood glucose or control… Hi Blood glucose may be higher than the measuring range of the… Err The meter was unable to pair with a mobile device. Battery The batteries are almost out of power.. Blank The meter will not turn on or the display is blank. E-13 Fluid or foreign material may be present in the test strip… E-14 An electronic error has occurred. 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-4 Not enough blood or control solution was drawn into the test… E-6 Blood or control solution was applied to the test strip before… E-3 A meter or test strip error has occurred. E-1 The test strip may be damaged, not properly inserted, or was… View all error messages