Hello <a data-id="7817" data-value="asauc-7817" data-denotation-char="@" href="/user/asauc-7817" class="text-decoration-none mention">@asauc-7817</a> , Thank you for asking your question in our community. I did see some of these error codes coming up not too long ago but they are all that common s thats probably why the documentation is limited on it. Fault code 155 is associated with an invalid opcode reset. This means the GO device reset after its firmware encountered an invalid instruction. Because it happened only once and the device is still working normally, this does not by itself indicate a hardware failure or require an RMA. The device appears to have recovered successfully. I recommend monitoring it for now. If the fault repeats, the device stops communicating, or other symptoms appear, please contact your reseller or Geotab Support for further investigation. Please let us know if you have any other questions. Hope that helps! Eishi FUN

FAULT 155 in MyGeotab

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Hello What does this type of failure imply? It only happened once, and the device is still working normally.<img class="ql-image" src="/forum/plugins/gcs-uploads/files/1788549398692-captura-de-pantalla-2026-09-04-131627.png"/>

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FAULT 155 in MyGeotab