A meter or test strip error has occured.

Repeat the blood glucose test. If a second E-3 code appears, perform a control test with the control solution and a new test strip.

• If the control result is within the acceptable range, review the proper testing procedure and repeat the blood glucose test with a new test strip.
• If the control result is not within the acceptable range, see the Understanding Out-of-Range Control Results section in the chapter Control Tests within the user's manual.

In rare cases, an E-3 error code may indicate that your blood glucose is extremely high and above the system's measuring range. If you do not feel like your blood glucose is extremely high, repeat the blood glucose test. See the Unusual Blood Glucose Results section in the chapter Blood Glucose Tests within the user's manual. If the E-3 code still appears for your blood glucose test, contact your healthcare professional immediately.

• If the E-3 code still appears for the blood glucose test, your blood glucose result may be extremely high and above the system's reading range. Contact a healthcare professional immediately.
• If the second test result does not match how you feel, perform a control test with the control solution and a new test strip.
• If the control result is within the acceptable range, review the proper testing procedure and repeat the blood glucose test with a new test strip.
• If the control result is not within the acceptable range, see Chapter 4 of the Accu-Chek Performa User Manual - Understanding Out-of-Range Control Results.