Accu-Chek Performa Error codes E-6 Blood or control solution was applied to the test strip before the flashing drop symbol appeared on the display. Discard the test strip and repeat the blood glucose or control test. E-10 The time and date settings may be incorrect. E-9 The battery is almost 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 was drawn into the test strip or was applied… E-3 A meter or test strip error has occured. E-1 The test strip may be damaged, not properly inserted, or was… View all error messages Product Support Support videos Downloads & Guides