Bafang error 37: Controller watchdog (WDT) fault

What it means

The controller's internal safety timer has found a problem.

Likely causes

• Controller software problem
• Controller fault

Symptoms

• Code 37 shows
• No assist

How to fix it

1. Switch the bike off, wait 10 seconds and switch it on again.
2. Your dealer can update the controller with the Bafang BESST tool or replace it.

How urgent is it?

Needs a dealer repair.

More Bafang codes

• 33 Brake sensor signal fault
• 35 15 V detection circuit fault
• 36 Keypad detection circuit fault
• 38 Sensor watchdog (WDT) fault
• 41 Battery voltage too high
• 42 Battery voltage too low

All 36 Bafang codes →