What is E-1 in acuchek active?

E-1 on the Accu-Chek Active blood glucose meter typically indicates a problem with the test strip, such as incorrect insertion or using an expired strip. It is important to ensure the strip is properly inserted into the meter and to use a new, unexpired test strip to obtain an accurate reading. If the issue persists, checking the meter's manual or contacting customer support may be necessary for further assistance.