Accu-Chek Active test strips
Error codes Lo
The test result is lower than 0.6 mmol/L (10 mg/dL). 
Your meter measures blood glucose within a defined range (0.6–33.3 mmol/L or 10-600 mg/dL).
The display may indicate that your blood glucose is lower than the measuring range of the system (0.6 mmol/L or 10 mg/dL).
Follow the relevant instructions given by your healthcare professional for possible hypoglycemia and immediately repeat the test.
If this does not match how you feel, contact customer support.