Zero error code 49
Contactor Open Disable
What it means
Contactor Open Disable
Main contactor open - motor disabled
Warning — Monitor the situation, may self-resolve.
What to do
- 1Check battery connections. Power cycle.
Code 49 on the other dash
The number alone is not enough. A Gen2 dash reads code 49 as Contactor Open Disable; a Gen3 dash reads the same number as Battery Module Incompatible. And the model name does not settle it: the S, SR, DS and DSR kept their names when they moved from the Sevcon dash to Cypher III in 2024, so it is the year that tells you which table applies.
Which bikes use this table
Sevcon-era dash: S, SR, DS (2014-2023), DSR (2016-2023), FX (2014-2025), FXS (2016-2021), FXE (2022-2025). The SDS and XMX owner manuals print the same 0-63 table.
Related codes
Other Gen2 Battery/BMS codes:
What the log file records for the same subsystem:
Questions
What does error code 49 mean on a Zero Gen2 dash?
Contactor Open Disable. Main contactor open - motor disabled. It is classed as warning: monitor the situation, may self-resolve.
What should I do about it?
Check battery connections. Power cycle.
Does code 49 mean the same thing on a Gen3 Zero?
No. On a Gen3 dash, code 49 is "Battery Module Incompatible" — a different fault entirely. The two tables share numbers but not meanings, so read the one that matches your dash, not your model name: the S, SR, DS and DSR kept their names when they moved to Cypher III in 2024.
See when this actually happened on your bike
A dash code tells you the fault; the log tells you the pack temperature, the state of charge and the ten minutes leading up to it.
Sources:
The code and its name are transcribed from Zero's own owner manuals; the severity, category and troubleshooting notes are ours. For official diagnostics, consult an authorized Zero Motorcycles dealer.