Error display (E, Er, Err)
The monitor could not finish the measurement, or found a fault, and shows a code instead of numbers. The number says which fault — but only in that maker’s own table.
Check your monitor’s manual — makers differ.
What it is for
Look the code up in your own monitor’s manual. Most are fixed by sitting still, refitting the cuff and measuring again after a short wait. Microlife marks several codes with: “Please immediately consult your doctor, if this or any other problem occurs repeatedly.” Omron: if Er “still appears, contact customer service.”
These pages report what each maker’s manual says and quote it wherever health is involved. They do not diagnose anything and are not medical advice; only your own monitor’s manual describes your model.
- What it looks like
- The letters E, Er or Err, usually with a number, shown instead of the blood pressure reading.
- Names makers use
- E1 to E5, Er and Err (Omron); «Err 1» to «Err 6», HI and LO (Microlife); ERROR 201 to 303 (Withings)
Where makes differ
The same code means different things on different makes. Microlife’s «Err 2» is movement (“caused for instance by movement or muscle tension”) and «Err 3» is “Abnormal cuff pressure”; Omron’s BP7250 manual ties E2 to moving or talking so that the cuff does not inflate enough, or to a systolic pressure above 210 mmHg. Omron uses Err for a failed connection to the phone app and Er for a monitor malfunction. Withings writes three-digit codes: 202 is talk or movement, 220 is a flat battery.
What it does not mean
An error code is not a reading. Microlife’s HI and LO are different: they mean the cuff pressure or pulse was out of range (HI: cuff over 299 mmHg or pulse over 200; LO: pulse under 40 beats per minute).
Other symbols with the same shapes
Sources
No published standard we could check defines blood pressure monitor control icons, so this meaning is taken from 3 makers’ own manuals and support pages, each fetched and read on the date shown:
- Omron: Omron — Instruction manual, 5 Series upper arm blood pressure monitor BP7250 (PDF) — Troubleshooting: “If E2 appears repeatedly, inflate the arm cuff manually …”; “If Er still appears, contact customer service”; “If the Err symbol still appears after checking the app, contact customer service.” Checked 2026-09-28.
- Microlife: Microlife — Instruction manual, BP B3 AFIB Advanced (PDF) — Section 8: «Err 1» “Signal too weak”, «Err 2» “Error signal”, «Err 3» “Abnormal cuff pressure”, «Err 5» “Abnormal result”, «Err 6» “MAM Mode”, «HI» “Pulse or cuff pressure too high”, «LO» “Pulse too low”. Checked 2026-09-28.
- Withings: Withings support — BPM Connect: an error message is displayed on the screen — “ERROR 201 : The cuff is not tight correctly … ERROR 202 : Talk or movement has been detected … ERROR 220 : Battery level is too low.” Checked 2026-09-28.
Written in our own words; quotations are the makers’ wording.