Accu-Chek Performa Error codes E-10 The time and date settings may be incorrect. Make sure the time and date are correct and adjust if necessary. 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-6 Blood was applied to the test strip before the flashing drop… 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