# Ender 3 v2 runout sensor

**URL:** https://marlin.crc.id.au/forum/t/ender-3-v2-runout-sensor/2158
**Category:** Bug Reports
**Tags:** ender-3-v2, bltouch
**Created:** [21 May 2024 18:10 UTC](https://marlin.crc.id.au/forum/t/ender-3-v2-runout-sensor/2158 "2024-05-21T18:10:02Z")
**Posts on this page:** 1
**Showing post:** 4

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### Author: ![BCNU](https://marlin.crc.id.au/forum/letter_avatar_proxy/v4/letter/b/9d8465/32.png) [@BCNU](https://marlin.crc.id.au/forum/u/BCNU)
#### Post date: [1 June 2025 18:31 UTC](https://marlin.crc.id.au/forum/t/ender-3-v2-runout-sensor/2158/4 "2025-06-01T18:31:11Z")

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I have the same problem on Ender-3 Max and found the fix in this thread: [Ender 3 Max 4.2.2 with Bltouch Filament sensor is reversed](https://marlin.crc.id.au/forum/t/ender-3-max-4-2-2-with-bltouch-filament-sensor-is-reversed/1624)

However, swapping wires results in the LED indicator in the filament sensor no longer working, and it’s a surface mount LED, so I will have to do without the LED I suppose.

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