Yamaha error 39: Crank sensor fault

What it means

The drive unit has detected a crank sensor fault and stopped assist. The code is stored for the dealer.

Likely causes

• Crank sensor fault

Symptoms

• Code 39 shown
• Assist stops

How to fix it

1. Turn the power off and on again.
2. If the code comes back, have the bike checked by a Yamaha e-bike dealer.

How urgent is it?

See a dealer if a restart does not clear it.

Applies to

• PW-SE / PW series SE
• PW-X / PW-X2
• PW series TE / CE / ST
• Display X
• Display A
• Display C

More Yamaha codes

• 36 Torque sensor fault
• 37 Torque sensor fault
• 38 Crank sensor fault
• 61 Controller fault
• 63 Controller fault
• 64 Controller fault

All 28 Yamaha codes →