What is the e-9 error code on accu-check aviva?

The e-9 error code on the Accu-Chek Aviva glucose meter indicates a meter malfunction or an issue with the test strip. This error may occur if the test strip is damaged, expired, or not inserted properly. To resolve the issue, ensure you're using a new, undamaged test strip and that it is inserted correctly. If the problem persists, consider contacting customer support for further assistance.