MAXXFORCE-U0100 moderate MaxxForce ›

Lost Communication with ECM

The MAXXFORCE-U0100 (MaxxForce) diesel fault code means: Lost Communication with ECM. This is a moderate severity code.

My Garage →
Keep driving?
No — stop driving
DIY difficulty
advanced
Estimated cost
$300-$3,500
Mobile mechanic network · I-5 corridor pilot

Down with a MaxxForce fault on the road?

We are building a network of verified mobile diesel and reefer technicians along the freight corridor. It is not live yet — no one can be dispatched to you today. You can see where the pilot is launching and register interest.

View pilot availability →

What Are the Symptoms of MAXXFORCE-U0100?

  • No start
  • Dash warnings
  • Dead scan tool

What Causes MAXXFORCE-U0100? (Most Likely First)

  • ECM power/ground fault Likely
  • CAN bus wiring short Possible
  • Failed ECM Possible

Can I Still Drive with MAXXFORCE-U0100?

No — stop driving. MAXXFORCE-U0100 is rated moderate severity. Continuing to drive in this state risks further damage — get it looked at before your next trip.

Frequently Asked Questions

What is U0100 on a MaxxForce 13 (12.4L)?

U0100 on a MaxxForce 13 (12.4L) (2008-2014) indicates: Lost Communication with ECM. This is a known fault code on the MaxxForce engine family and typically points to the causes listed above.

Can I drive with U0100 on my MaxxForce?

No. Stop driving and arrange for towing. Continued operation risks catastrophic damage or stranding.

How much does it cost to fix MaxxForce U0100?

Repair cost is typically $300-$3,500 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-U0100?

  1. Verify ECM power and grounds.

  2. Check CAN bus termination resistance (should be 60 ohms).

U0100 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 U0100 Bobcat critical Lost Communication with ECM / PCM A Duramax serious Lost Communication with ECM/PCM A Hino serious Lost Communication with ECM/PCM Isuzu serious Lost Communication with ECM/PCM Kubota serious Lost Communication with ECM/PCM PACCAR serious Lost Communication with ECM/PCM Yanmar critical Lost Communication with ECM

Which Vehicles Commonly Get MAXXFORCE-U0100?

  • 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

Was this helpful?

Send this to whoever is fixing the truck — your tech, or the person asking what the fault means.