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Common Error Codes

04 Sep 2025 by Danielle M. Shilling, M.D.

Troubleshooting a Blood Glucose Meter That Keeps Giving Error Codes

Using a blood glucose meter is a crucial part of managing your blood sugar levels. However, sometimes these meters can give error codes, which can be frustrating and worrisome. In this article, we'll guide you through the steps to troubleshoot a blood glucose meter that keeps giving error codes.

Common Error Codes

Before we start troubleshooting, it's essential to familiarize yourself with common error codes your meter may display. These codes can be specific to your meter's brand and model, but here are some general error codes you might encounter:

  • 0: No error code, but a low or invalid reading.
  • 1: Incorrect test strip.
  • 2: Low battery or no battery.
  • 3: Incorrect sampling (not enough blood or blood not from finger).
  • 4: Meter not calibrated or calibration failure.
  • 5: Error with the meter itself.

Steps to Troubleshoot

Now that you're familiar with common error codes, let's move on to the steps to troubleshoot your meter:

Step 1: Check the Battery

Ensure your meter's battery is fully charged or replace it if necessary. A low battery can cause error codes, so it's essential to check this first.

Step 2: Check the Test Strip

Verify that you're using the correct test strips for your meter. Check the expiration date and ensure they're stored correctly.

Step 3: Check Your Sampling

Ensure you're collecting the correct amount of blood (usually 0.5-1.0 microliters). Also, make sure the blood is from your finger and not from another source.

Step 4: Check the Meter's Calibration

If your meter is calibrated, ensure it's done correctly. Check your meter's user manual for calibration instructions. A1C Vs Fasting Glucose Which Blood Sugar Test Is Better

Step 5: Clean and Maintain Your Meter

Regularly clean and maintain your meter to ensure it's working correctly. Remove any dust or debris from the meter's surface and electrodes.

Step 6: Contact the Manufacturer

If none of the above steps resolve the issue, contact the manufacturer's customer support for further assistance. They may be able to provide additional troubleshooting steps or replace your meter if it's faulty. Understanding Your Fasting Blood Sugar Level From Normal To Prediabetes Range

Additional Tips

Here are some additional tips to help you troubleshoot your meter:

  • Always check the user manual for specific error code meanings and troubleshooting steps for your meter.
  • Keep your meter's software up to date, if applicable.
  • Use the correct test strips and calibration solutions for your meter.
  • Regularly clean and maintain your meter to ensure it's working correctly.

By following these steps and tips, you should be able to troubleshoot your blood glucose meter and resolve the error codes. If you're still experiencing issues, don't hesitate to contact the manufacturer's customer support for further assistance. Are Your Blood Sugar Levels In The Prediabetes Range Here S How To Tell

References and Further Reading