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Error· MBB / BMS log file

Throttle Fault

Throttle position sensor reading invalid

SystemSource: MBBLog file condition
Last updated: July 30, 2026

What it means

Throttle position sensor reading invalid

ErrorIssue detected, may affect performance.

Likely causes

  • Throttle grip wiring issue
  • Throttle sensor failure
  • Controller input fault

What to do

  1. 1Check throttle connector
  2. 2Ensure throttle moves freely
  3. 3If persists, do not ride

Which bikes use this table

Recorded in the binary log rather than shown on the dash — every generation writes them.

Questions

What does "Throttle Fault" mean in a Zero log?

Throttle position sensor reading invalid. It is written by the MBB. It is classed as error: issue detected, may affect performance.

What should I do about it?

Check throttle connector. Ensure throttle moves freely. If persists, do not ride.

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.

Upload a log

Community reference: ZeroManual wiki entry

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.