E1 in the display means the test strip may be damaged or not properly inserted. Remove and reinsert the test strip, or replace it if damaged. If the message reappears, please contact Accu-Chek Customer Care.

Accu-Chek Guide Me

Accu-Chek Guide

Accu-Chek Aviva Meter

Accu-Chek Aviva Connect

Accu-Chek Nano