Error Codes and Their Meanings

Updated 2 months ago by Sue Furdek

Even if you've been using a Keto-Mojo meter for a long time, you're likely to get an error code  every now and then. If you get one and don't know what it means, this nifty chart will help clarify things.  In the right hand column, you'll find a link to information that will help you prevent the error code. 

CodeWhat It MeansWhat to DoLink to Help
E-bYour batteries are too low.Change the batteries.
E-2The meter thinks the test strip has expired code chip.Check the year setting first; if it's not accurately set, it may cause at E-2 error. If that doesn't work, try the meter again with a new lot of test strips to learn if the strips are, in fact, expired.What is the E-2 error and how do I fix it?
E-UThe meter thinks it has a used strip.Repeat test with a fresh, unused strip, following the steps in the help article, linked at right.What is the E-U error reading and how do I fix it?
E-tThis appears when the ambient temperature is above or below system-operation range.The system operation temperature range is 50°F to 104°F (10°C to 40°C). Repeat the test after the meter and the test strips are in the system-operating range.
There's a potential problem with the meter.Try to test again with a new test strip. If the meter still doesn't work, contact customer service for assistance. Don't worry-- all meters come with a lifetime guarantee, so we've got your back!How do I contact Customer Support?
E-FThis error appears when your strip doesn't get enough blood volume, when the test strip is removed while processing, or when the HCT result is above 75%.For more information, check out our help article (linked at right). Repeat with a new test strip. If the problem persists, contact customer service. We're happy to help!What is the E-F error and how do I fix it?

How did we do?