AI DamageU0146 code: Lost Communication With Serial Data Gateway Module A
Code U0146 is named in 11 US owner complaints. Models: 5, model years 2019–2025.
What the code means
Lost Communication With Serial Data Gateway Module A. Generic meaning per SAE J2012 (the same for all makes).
How to read U0146: 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 146 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
- 11
- Models
- 5
- Model years
- 2019–2025
Which models and years
Models whose owners name this code (5). Years link to the model year problems page.
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.
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.
The vehicle was taken to Auto Zone, where the portable diagnostic tester was attached to the vehicle. The diagnostic machine retrieved DTC: U0073, P0700, P25A2, U0101,U0129,U0146, U18D5, U18D7, U2413, U0073-00, U0100-00, U0140-00, U0151-00, U026A-00, U0420-00 and U0100.
No warning lights illuminated. Additionally, an OBD2 diagnostic scan retrieved diagnostic trouble codes: U0146, U0101, and U0100. A local dealer was contacted; however, the vehicle was not diagnosed or repaired because the VIN was not included in any recall.
Related codes
- U3000Control Module
- U0073Control Module Communication Bus A Off
- U0140Lost Communication With Body Control Module
- U3003Battery Voltage
- U0001High Speed CAN Communication Bus
- U0422Invalid Data Received From Body Control Module
- U0002High Speed CAN Communication Bus Performance
- 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.