What is E-1 mean on accu-chek glucose meter?

The E-1 error code on an Accu-Chek glucose meter typically indicates a problem with the test strip, such as improper insertion, a damaged strip, or a strip that is expired. To resolve this issue, you should remove the test strip, check for any visible damage, and ensure you are using a new, valid strip. If the problem persists, refer to the user manual or contact customer support for further assistance.