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Bobcat · Controls

Bobcat code D3907: Left joystick Y-axis not in neutral

What it means

The left joystick's forward/back (Y) axis isn't reading neutral when the controller expects it to, usually at startup.

Can I keep running?

Stop: fix before running

No. Stop the machine safely (bucket or attachment down, engine off) and find the cause before you run it again.

Check first

  1. Park on level ground, lower the lift arms and attachment to the ground, stop the engine and remove the key.
  2. Turn the key off, keep your hands off the controls, and restart. Don't touch the joystick until the panel finishes its startup check.
  3. Check that the joystick moves freely and springs back to center. Look for debris or a damaged boot.
  4. If the code returns with the joystick centered, stop and call your dealer.
  5. Do not bypass or modify the seat bar, BICS interlocks or parking brake to keep working.

Likely causes

  • Joystick held or bumped during startup
  • Joystick sticking or not returning to center
  • Faulty joystick sensor or wiring

The fix

If it clears after a hands-off restart, nothing is wrong. If it keeps coming back, the joystick or its sensor needs a dealer check or calibration. A control that doesn't read neutral can cause unexpected movement.

Different code on your screen? Snap the display and Mechy reads it.

Related controls codes

All Bobcat codes

Questions

What does Bobcat code D3907 mean?

Left joystick Y-axis not in neutral. The left joystick's forward/back (Y) axis isn't reading neutral when the controller expects it to, usually at startup.

Can I keep running with D3907?

No. Stop the machine safely (bucket or attachment down, engine off) and find the cause before you run it again.

How do I fix Bobcat code D3907?

If it clears after a hands-off restart, nothing is wrong. If it keeps coming back, the joystick or its sensor needs a dealer check or calibration. A control that doesn't read neutral can cause unexpected movement.

Sources

  1. Bobcat Company, Diagnostic Service Codes list (fault codes PDF, 2020)
  2. Bobcat T450 Operation & Maintenance Manual 7250077 (2018), Diagnostic Service Codes
  3. BigRentz, Full List of Bobcat Fault Codes (searchable table)

Code meanings vary by model, serial range and software. Confirm with your operator's manual or Bobcat dealer before replacing parts.

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