AI DamageU0101 code: Lost Communication With TCM
Code U0101 is named in 74 US owner complaints, 1 of them (1%) after a crash. Models: 43, model years 2005–2025.
There is little data for this code or its meaning is ambiguous, so this page is not indexed.
What the code means
Lost Communication With TCM. Generic meaning per SAE J2012 (the same for all makes).
How to read U0101: the letter U means network communication between modules; the second digit 0 marks a generic SAE code shared by all makes; the last three characters 101 identify the specific fault.
Codes for engine, transmission, transfer case and hybrid system modules. When valuing an auction car the key question is whether the fault is crash related (cut wiring, damaged radiator) or a known defect of the model.
Key figures
- Complaints with this code
- 74
- after a crash
- 1 (1%)
- Models
- 43
- Model years
- 2005–2025
Which models and years
Models whose owners name this code (43). Years link to the model year problems page.
| Model | Years | Complaints |
|---|---|---|
| Chevrolet Silverado 1500 | 2009, 2019, 2020, 2022 | 7 |
| Ford Focus | 2012, 2013, 2014, 2016 | 6 |
| Mazda Mazda3 | 2006, 2010, 2012, 2013 | 4 |
| Chevrolet Cobalt | 2005, 2007 | 3 |
| GMC Sierra 1500 | 2022, 2025 | 3 |
| GMC Sierra 2500 | 2012, 2013, 2014 | 3 |
| Jeep Wrangler | 2022 | 3 |
| Cadillac CTS | 2008, 2013 | 2 |
| Chevrolet Colorado | 2016 | 2 |
| Chevrolet Equinox | 2013, 2019 | 2 |
| Chevrolet Impala | 2012, 2014 | 2 |
| Chevrolet Malibu | 2018, 2023 | 2 |
| Chevrolet Silverado 2500 | 2012, 2013 | 2 |
| Chevrolet Sonic | 2013, 2015 | 2 |
| Dodge Charger | 2013, 2014 | 2 |
| Dodge Dart | 2012, 2015 | 2 |
| Acura RLX | 2014 | 1 |
| Audi Q3 | 2018 | 1 |
| Buick Regal | 2013 | 1 |
| Buick Verano | 2016 | 1 |
| Chevrolet Cruze | 2015 | 1 |
| Chevrolet HHR | 2009 | 1 |
| Chevrolet Spark | 2014 | 1 |
| Chevrolet Suburban | 2023 | 1 |
| Chevrolet Tahoe | 2008 | 1 |
| Chevrolet Trax | 2021 | 1 |
| Chrysler 200 | 2015 | 1 |
| Dodge Caliber | 2008 | 1 |
| Dodge Durango | 2014 | 1 |
| Ford Escape Hybrid | 2020 | 1 |
| Ford Explorer | 2010 | 1 |
| GMC Acadia | 2012 | 1 |
| GMC Yukon | 2023 | 1 |
| Honda Accord Hybrid | 2024 | 1 |
| Hyundai Elantra | 2010 | 1 |
| Hyundai Veracruz | 2009 | 1 |
| KIA Niro | 2023 | 1 |
| KIA Sedona | 2015 | 1 |
| KIA Soul | 2010 | 1 |
| Nissan Frontier | 2015 | 1 |
Components named together with the code
Component as the owner filed it (one complaint can list several).
Complaints by model year
What to do if an auction car has this code
- Separate crash damage (wiring, radiator, mounts) from known model defects: see the model year problems page.
What owners report
Excerpts of owner complaints in the original wording. Owner statements not verified by the regulator; personal data removed.
I just have major safety concerns. I pulled a diagnostic report later and found these codes: SHIFT module codes U0101-00 (lost communication with the transmission computer) and U2141-87
The dealer said I should not be concerned about the other codes. Diagnostic codes reported: B1A68 (0x76), U0101, U0102, U0131, U0140, U0146, U0151, U0155, U0265, U0422, U160F, U1610, U1611.
This creates risk from loss of all electronic safety assists in traffic and from the vehicle failing to start when needed. Stored codes show lost CAN communication among multiple modules: U0101, C1611, C1693, U0111, U0164, U0293, U042B, U1341. Confirmed by two Kia dealerships over five warranty visits.
Sources: public official US data (owner complaints) and the SAE J2012 standard. Complaints are owner statements not verified by the regulator. A code from a complaint does not replace a scan tool diagnosis. Data updated 2026-11-10.