MAXXFORCE-U0101 moderate MaxxForce ›

Lost Communication with TCM

The MAXXFORCE-U0101 (MaxxForce) diesel fault code means: Lost Communication with TCM. This is a moderate severity code.

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Keep driving?
Short distances only
DIY difficulty
advanced
Estimated cost
$250-$2,800
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What Are the Symptoms of MAXXFORCE-U0101?

  • Transmission limp
  • No shift
  • CEL

What Causes MAXXFORCE-U0101? (Most Likely First)

  • Allison / Eaton TCM failure Likely
  • CAN fault Possible

Can I Still Drive with MAXXFORCE-U0101?

Short distances only. MAXXFORCE-U0101 is rated moderate severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.

Frequently Asked Questions

What is U0101 on a MaxxForce 13 (12.4L)?

U0101 on a MaxxForce 13 (12.4L) (2008-2014) indicates: Lost Communication with TCM. This is a known fault code on the MaxxForce engine family and typically points to the causes listed above.

Can I drive with U0101 on my MaxxForce?

Only drive short distances to reach a repair facility. Continued operation may cause further damage or progressive derate.

How much does it cost to fix MaxxForce U0101?

Repair cost is typically $250-$2,800 depending on the underlying cause and shop rate. Many MaxxForce faults (especially EGR cooler, head bolt, and VGT repairs) are major expenses that drove fleet owners to repower with Cummins or retire these trucks early.

Mechanics Guide Step-by-step diagnosis

How Do You Diagnose MAXXFORCE-U0101?

  1. Check for power at TCM.

  2. Test CAN continuity to TCM.

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) Kubota serious Lost Communication with TCM PACCAR serious Lost Communication with TCM Yanmar serious Lost Communication with Transmission / Hydrostat Controller

Which Vehicles Commonly Get MAXXFORCE-U0101?

  • International ProStar MaxxForce 13
  • International LoneStar MaxxForce 13
  • International TranStar 8600 MaxxForce 13
  • International PayStar 5900 MaxxForce 13
  • International 9900i MaxxForce 13

Explore More

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

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