# Error 155 in VRM settings

**URL:** <https://community.victronenergy.com/t/error-155-in-vrm-settings/54378>\
**Category:** DIY\
**Tags:** 4g, cerbo\_gx, vrm, diy\
**Created:** [4 March 2026 18:07 UTC](https://community.victronenergy.com/t/error-155-in-vrm-settings/54378 "2026-03-04T18:07:44Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![cwvandy](https://avatars.discourse-cdn.com/v4/letter/c/c4cdca/32.png) [@cwvandy](https://community.victronenergy.com/u/cwvandy)\
**Post date:** [4 March 2026 18:07 UTC](https://community.victronenergy.com/t/error-155-in-vrm-settings/54378/1 "2026-03-04T18:07:44Z")

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I have been connecting to the VRM via a **Victron GX LTE 4G cellular** through my Cerbo GX. It has been working great. The Cerbo shows a good mobile internet connection but suddenly I am getting a 155 error on VRM settings and no VRM connection. I have rebooted, checked firmware, turned off all WiFi but still no connection. Any ideas about how to remedy?

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<div class="post-metadata">

**Author:** ![lxonline](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/lxonline/32/25567_2.png) [@lxonline](https://community.victronenergy.com/u/lxonline)\
**Post date:** [4 March 2026 19:08 UTC](https://community.victronenergy.com/t/error-155-in-vrm-settings/54378/2 "2026-03-04T19:08:25Z")

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Error 155 on other GXs is a routing issue.

Error #155 Routing error: VRM is unreachable. This error occurs if an ICMP error is received, indicating that no route exists to the VRM server. Make sure your DHCP server assigns a working default route, or that the gateway is correctly configured for static configurations.

Have you worked through any of [the troubleshooting](https://www.victronenergy.com/media/pg/GX_LTE_4G/en/troubleshooting.html#UUID-d6887c60-0748-5aa5-69f8-11a00fa98e76)?

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<div class="post-metadata">

**Author:** ![cwvandy](https://avatars.discourse-cdn.com/v4/letter/c/c4cdca/32.png) [@cwvandy](https://community.victronenergy.com/u/cwvandy)\
**Post date:** [4 March 2026 19:52 UTC](https://community.victronenergy.com/t/error-155-in-vrm-settings/54378/3 "2026-03-04T19:52:24Z")

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Yes. Checked all these.

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<div class="post-metadata">

**Author:** ![lxonline](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/lxonline/32/25567_2.png) [@lxonline](https://community.victronenergy.com/u/lxonline)\
**Post date:** [5 March 2026 04:52 UTC](https://community.victronenergy.com/t/error-155-in-vrm-settings/54378/4 "2026-03-05T04:52:17Z")

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If no settings/chnages were made beofr this all i can think is maybe the mobile service provider side has an issue.