Lost Communication with ABS / Traction Control Module
The BOBCAT-U0121 (Bobcat) diesel fault code means: Lost Communication with ABS / Traction Control Module. This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- intermediate
- Estimated cost
- $150-$900
What Are the Symptoms of BOBCAT-U0121?
- Traction control lamp on larger Bobcat utility vehicles
What Causes BOBCAT-U0121? (Most Likely First)
- ABS module CAN fault on UW56 utility vehicle Possible
- Wiring damage under skid plate Possible
Can I Still Drive with BOBCAT-U0121?
Yes, but fix soon. BOBCAT-U0121 is rated moderate severity. It is not an immediate stop-driving fault, but it will not clear itself — book the repair rather than ignoring it.
Frequently Asked Questions
What is Bobcat code U0121?
Bobcat U0121: Lost Communication with ABS / Traction Control Module. This code is reported on Bobcat equipment running the described engine family.
Can I keep working with Bobcat code U0121?
Usually drivable short-term, but fix soon to avoid derate or DPF issues.
How much does Bobcat U0121 cost to fix?
Estimated repair cost: $150-$900. Off-road diesel shop labor runs $125-$175/hr in 2026. Dealer diagnostic software (Bobcat Service Analyzer) is usually required.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose BOBCAT-U0121?
Inspect harness under skid plate.
Verify ABS module power and ground.
U0121 on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown:
Which Vehicles Commonly Get BOBCAT-U0121?
- Bobcat UW56 utility vehicle
- Bobcat UW32 utility vehicle
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