● Checked Nov 12, 2026From TerraMow support
TerraMow errorE0803
TerraMow V1000 "Vision sensor or base station marker dirty or blocked" (E0803): what it means and the fix
Steps4
ToolsNone
PartsNone
Works for TerraMow V Series (V1000 and V600).
Short answer
What it means: The robot's vision sensor, or the marker on the base station it uses to find home, is dirty or blocked.
Quick fix: Clean the vision sensor with a soft cloth.
Fix it in 4 steps
- Clean the vision sensor with a soft cloth.Done?
- Clean the base station marker and remove mud, leaves or debris.Done?
- Check the marker and its QR code for damage.If it is damaged, try turning off Multi-base Map in Robot Settings in the app.Done?
- Remove weeds or grass around the base station.The app shows details under Maintenance, Base Station.Did it work?
Fixed when: The robot can see the station and docks normally.
Great, it is fixed. Bookmark this page in case it comes back.
Still showing Vision sensor or base station marker dirty or blocked?
The code comes back after a restart. Email TerraMow support at [email protected] with the error code, or send feedback from the TerraMow app. Contact TerraMow support. Warranty: 2 year limited warranty on the mower, base station, adapter and battery pack, per the V Series manual. TerraMow support →
Parts that fix this
Replacement bladesFor TerraMow V1000 on AmazonCheck price →Check the part fits your model. Affiliate links: we may earn a commission at no cost to you.
Why it happens
- Dirt on the vision sensor
- Mud, leaves or debris on the station marker
- Weeds or grass around the station
Other TerraMow V1000 errors
E0001Blade disc blocked›E0002Blade disc motor error›E0003Blade jammed›E0004Blade disc motor error›E0101Cutting height module blocked›E0102Cutting height module error›E0103Cutting height module blocked›E0201Robot lifted›E0202Robot lifted›E0301Safety key not detected›E0401Robot tilted›E0402Robot tilted›E0403Motion sensor error›E0501Drive wheel blocked›E0502Drive wheel motor error›E0503Drive wheel motor error›E0504Drive wheel motor blocked›E0601Charging voltage error›E0602Battery fault›E0603Battery temperature out of range›E0604Battery fault›E0701Weak charging connection›E0801Vision sensor error›E0802Vision sensor error›E0807Robot slips or gets stuck near the station›E0809Vision sensor dirty›E0902Dangerous drop detected›E0903Robot stuck›E0904Target area unreachable›E0905Cannot return to the base station›E0906Obstacles near the station prevent docking›E0908Start the task from the base station›E0909Path planning failed›E0910No power at the base station›E0911Cannot leave the base station›E0912Map does not match the surroundings›E0913Sparse grass blocks leaving the station›E0914Robot outside the work area›E1400Collision sensor blocked›E1404Factory mode›E1406Temperature too high›E1408Base station in the wrong place›E1409Anti-theft alarm›E1410GPS module error›All 48 TerraMow V1000 codes →