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Kubota · Electrical

Kubota code E-93: Starter relay trouble

What it means

On Kubota tractors such as the L3301, L3901 and MX series, E-93 means the relay for the engine starter motor is in trouble. The operator's manual says the engine may not start and to contact your dealer.

Can I keep running?

Keep going carefully, fix soon

Usually, if the machine runs normally: finish the job carefully and fix it soon. Stop if the machine derates, overheats, loses power or the code comes with an alarm.

Check first

  1. Park on level ground, lower the loader, attachment or implement to the ground, set the parking brake, stop the engine and remove the key.
  2. Check battery voltage and clean and tighten the battery cables.
  3. Check the starter relay is fully seated and inspect its fuse and connector.
  4. Clear the warning and see whether it returns. Clearing the warning on the panel doesn't erase the code stored in the engine ECU. If the fault is still there, it comes back.

Likely causes

  • Failed or loose starter relay
  • Corroded relay socket or connector
  • Damaged wiring in the starter relay circuit

The fix

Replacing the starter relay or repairing its wiring is the usual fix. If the tractor starts normally, the warning may still stay stored until a dealer clears it.

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

Related electrical codes

All Kubota codes

Questions

What does Kubota code E-93 mean?

Starter relay trouble. On Kubota tractors such as the L3301, L3901 and MX series, E-93 means the relay for the engine starter motor is in trouble. The operator's manual says the engine may not start and to contact your dealer.

Can I keep running with E-93?

Usually, if the machine runs normally: finish the job carefully and fix it soon. Stop if the machine derates, overheats, loses power or the code comes with an alarm.

How do I fix Kubota code E-93?

Replacing the starter relay or repairing its wiring is the usual fix. If the tractor starts normally, the warning may still stay stored until a dealer clears it.

Sources

  1. Kubota L3301/L3901 Operator's Manual TC620-1973-8, error codes
  2. Kubota MX4800/MX5200/MX5800 Operator's Manual TC650-1971-2, error codes
  3. Kubota L3301/L3901/L4701 Workshop Manual 9Y111-10123 (2019), engine diagnosis codes
  4. TractorByNet forum, How to reset Kubota error? (L3901 E93 starter relay)

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

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