AI DamageU0100 code: Lost Communication With ECM/PCM A
Code U0100 is named in 88 US owner complaints, 1 of them (1%) after a crash. Models: 53, model years 2005–2024.
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 ECM/PCM A. Generic meaning per SAE J2012 (the same for all makes).
How to read U0100: 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 100 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
- 88
- after a crash
- 1 (1%)
- Models
- 53
- Model years
- 2005–2024
Which models and years
Models whose owners name this code (53). Years link to the model year problems page.
| Model | Years | Complaints |
|---|---|---|
| Chevrolet Silverado 1500 | 2007, 2009, 2019, 2020, 2021 | 10 |
| Dodge Charger | 2006, 2014, 2018 | 7 |
| Ford Focus | 2012, 2014, 2017 | 5 |
| Chevrolet Equinox | 2006, 2010, 2012, 2019 | 4 |
| Chevrolet Malibu | 2008, 2020, 2023 | 3 |
| Dodge Durango | 2014, 2015, 2017 | 3 |
| GMC Sierra 1500 | 2016, 2019, 2023 | 3 |
| Chevrolet Tahoe | 2016, 2019 | 2 |
| Chrysler 300C | 2006 | 2 |
| Ford Escape Hybrid | 2020 | 2 |
| Ford F-150 | 2015, 2016 | 2 |
| Jeep Grand Cherokee | 2018 | 2 |
| RAM 1500 | 2015, 2019 | 2 |
| Toyota Prius | 2008 | 2 |
| Acura RLX | 2014 | 1 |
| Audi A4 Avant | 2012 | 1 |
| Buick Envision | 2017 | 1 |
| Buick Lacrosse | 2016 | 1 |
| Buick Regal | 2013 | 1 |
| Cadillac CTS | 2008 | 1 |
| Chevrolet Bolt EV | 2017 | 1 |
| Chevrolet Camaro | 2011 | 1 |
| Chevrolet Cobalt | 2006 | 1 |
| Chevrolet Colorado | 2018 | 1 |
| Chevrolet Cruze | 2015 | 1 |
| Chevrolet Trax | 2020 | 1 |
| Chrysler 200 | 2012 | 1 |
| Chrysler 300 | 2006 | 1 |
| Chrysler Pacifica Plug-IN Hybrid | 2018 | 1 |
| Chrysler SRT8 | 2006 | 1 |
| Ford Ecosport | 2018 | 1 |
| Ford Explorer | 2017 | 1 |
| Ford F-250 SD | 2005 | 1 |
| Ford F-350 SD | 2022 | 1 |
| Ford Fusion | 2011 | 1 |
| Honda Accord | 2018 | 1 |
| Honda Accord Hybrid | 2024 | 1 |
| Honda Civic | 2021 | 1 |
| Honda Insight | 2020 | 1 |
| Infiniti Q50 | 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.
The vehicle is currently at the ins inspection lot. The code was U0100. ECM/PCM âAâ DTC. I was injured in the accident and concerned about safety of others
checked out car for traction control light staying doen scanned car on computer-received code U0-0100-00 ABS Computer may have to be re-programmed checked out rubbing noise in rear of car-no start and/or transmission engagement loss of power with DTCS U0100 intermittent concerns of loss of transmission engagement…
Vehicle went into limp home mode at highway speeds, reporting stored OBD-II codes including: U0100, U0415:00:08, U0415:00:28, B1088, U0418, U0253, U3000:42:69, P061A The check engine light illuminated. The dashboard spewed numerous systems disabled message.
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.