AI DamageU0001 code: High Speed CAN Communication Bus
Code U0001 is named in 20 US owner complaints. Models: 14, model years 2009–2025.
What the code means
High Speed CAN Communication Bus. Generic meaning per SAE J2012 (the same for all makes).
How to read U0001: 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 001 identify the specific fault.
Lost communication codes (U0xxx) mean one module cannot hear another on the data bus. The cause can be the module itself, its power or ground, or a damaged wiring harness. After a crash this is a typical trace: the impact tears wiring in the rail, fender or rocker and modules drop off the network.
Key figures
- Complaints with this code
- 20
- Models
- 14
- Model years
- 2009–2025
Which models and years
Models whose owners name this code (14). Years link to the model year problems page.
| Model | Years | Complaints |
|---|---|---|
| Chrysler Pacifica | 2017, 2018, 2019 | 4 |
| Jeep Cherokee | 2015, 2017 | 3 |
| Chrysler 200 | 2015, 2016 | 2 |
| Dodge Challenger | 2015 | 1 |
| Dodge Durango | 2014 | 1 |
| Fiat 500 | 2013 | 1 |
| Jeep Gladiator | 2020 | 1 |
| Jeep Grand Cherokee | 2017 | 1 |
| Jeep Renegade | 2017 | 1 |
| Jeep Wrangler | 2023 | 1 |
| KIA Sedona | 2015 | 1 |
| KIA Sportage | 2025 | 1 |
| RAM 1500 | 2017 | 1 |
| Toyota Highlander | 2009 | 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
- Check wiring harnesses in the impact zone: rail, fender, rocker, pillar.
- Check the battery and grounds: low voltage triggers false lost communication codes.
- Budget a network scan: a missing module may be intact while its wiring is damaged.
What owners report
Excerpts of owner complaints in the original wording. Owner statements not verified by the regulator; personal data removed.
I had just purchased this vehicle that has 15,000 miles and there were no other symptoms up until this issue occurred. I had the code read and it was a generic U0001 CAM error (Controller Area Module).
The manufacturer's mandatory 73B Safety Recall update (Vehicle Fires) creates a critical software-induced communication failure on the central vehicle network. Following the 73B flash, the vehicle developed an Active SGW U0001-00 CAN C Bus network fault, which permanently blocks data transmission and triggers an HCP…
The check engine light would randomly be on and gives a U0001 code. Sometimes it would affect the drivability of the car. The car stalled on us at a red light. The car couldnât accelerate after pressing the brake and made loud noise when press the gas at a very busy traffic situation.
Related codes
- U3000Control Module
- U0073Control Module Communication Bus A Off
- U0140Lost Communication With Body Control Module
- U3003Battery Voltage
- U0422Invalid Data Received From Body Control Module
- U0002High Speed CAN Communication Bus Performance
- U0146Lost Communication With Serial Data Gateway…
- U0141Lost Communication With Body Control Module A
- U3006Control Module Input Power A Circuit/Open
- U0010Medium Speed CAN Communication Bus
- U0029Vehicle Communication Bus A Performance
- U3001Control Module Improper Shutdown Performance
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.