What does E -5 on the accu-chek meter mean?

E-5 on an Accu-Chek meter typically indicates a problem with the test strip, such as it being inserted incorrectly, damaged, or expired. It suggests that the meter is unable to read the blood sample due to these issues. To resolve this, users should remove the strip and try again with a new, undamaged strip, ensuring it is inserted correctly. If the problem persists, consulting the user manual or contacting customer support is advisable.