| Problem | Result | Recommendation |
| Test strip not fully inserted into meter | Code error | Always be sure test strip is fully inserted in meter. |
| Patient sample site (for example, the fingertip) is contaminated with sugar | False high | Always clean and dry test site before sampling. |
| Not enough blood applied to strip | Er4 | Repeat test with a new sample. |
| Batteries low on power | Batter error | Change batteries and repeat sample collection. |
| Test strips/Control solutions stored at temperature extremes | Fales high/ low | Store kit and components according to directions. |
| Squeezing fingertip too hard because blood is not flowing | False low | Repeat test with a new sample from a new stick. |
| Test strip/Control solution vial cracked | False high/ low | Always inspect package for cracks, leaks, etc. |
