KUBOTA-U0101 serious Kubota ›

Lost Communication with TCM

The KUBOTA-U0101 (Kubota) diesel fault code means: Lost Communication with TCM. This is a serious severity code.

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Keep driving?
Limp mode only
DIY difficulty
advanced
Estimated cost
$50-$400 harness, $900+ TCM
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Common Symptoms

  • Trans warning lamp
  • Gear selection erratic

Probable Causes (Ranked by Likelihood)

  • CAN-H/CAN-L wire damage at articulation point Likely
  • Failed TCM Possible

Frequently Asked Questions

What is Kubota code U0101?

Kubota U0101 means: Lost Communication with TCM. Serious code -- address promptly to avoid inducement / further damage.

Can I keep using my Kubota with U0101?

Serious fault -- you can move the machine to a shop but don't run it under load. Use Kubota Diagmaster software (dealer tool) for full diagnostics.

How much does U0101 cost to fix on a Kubota?

Repair cost range: $50-$400 harness, $900+ TCM. Compact-tractor labor is typically $110-$150/hr in 2026.

Mechanics Guide Step-by-step diagnosis

Step-by-Step Diagnostic Procedure

  1. Check CAN bus voltages at TCM (60 ohm terminator test).

  2. Inspect harness.

U0101 on Other Platforms

The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown:

Gas / Automotive (OBD-II) Generic OBD-II definition for U0101 Bobcat serious Lost Communication with Transmission Control Module (Hydrostatic) Duramax serious Lost Communication with TCM Hino serious Lost Communication with TCM Isuzu serious Lost Communication with TCM (Aisin / GM trans) MaxxForce moderate Lost Communication with TCM PACCAR serious Lost Communication with TCM Yanmar serious Lost Communication with Transmission / Hydrostat Controller

Commonly Affected Vehicles

  • Kubota M4-071 / M4-072 utility tractors
  • Kubota M5-091 / M5-111 utility tractors
  • Kubota M6S-111 tractors
  • Kubota M7-132 / M7-152 / M7-172 premium tractors
  • Kubota MX4800 / MX5400 / MX5800 / MX6000 utility tractors

Explore More

More Kubota codes → Diesel home All diesel codes Heavy-duty Guides

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