● Checked Nov 12, 2026From TerraMow support
TerraMow errorE0403
TerraMow V1000 "Motion sensor error" (E0403): what it means and the fix
Steps3
ToolsNone
PartsNone
Works for TerraMow V Series (V1000 and V600).
Short answer
What it means: The robot's motion sensor has a fault, so it cannot keep working.
Quick fix: Turn off the main power switch on the underside of the robot.
Fix it in 3 steps
- Turn off the main power switch on the underside of the robot.Done?
- Wait 10 seconds, then turn it back on.Done?
- Try the task again.Did it work?
Fixed when: The code does not come back after the restart.
Great, it is fixed. Bookmark this page in case it comes back.
Still showing Motion sensor error?
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.
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›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›E0803Vision sensor or base station marker dirty or blocked›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 →