U02A7Lost Communication With Engine Sound Control 1
- Generic OBD-II code · Network
- How the car detects it
- Engine sound control means active sound design: a controller composes or amplifies engine sound from live data such as engine speed and torque and plays it through speakers or a structure-borne actuator, the way Volkswagen's Soundaktor or Kia's Active Sound System do. Where this runs in a separate unit, U02A7 records that unit 1 has stopped sending its network messages. Many makers integrate the function elsewhere: Ford's 2021 programme 21U04 for the Explorer ST and Lincoln Aviator had dealers activate active noise control and engine sound enhancement within the audio controller using the FDRS tool, because the plant had left them off. No manufacturer documents U02A7 publicly. Consequences are acoustic only: the synthetic sound is missing, the cabin may sound plainer.
- What you may notice
- Synthetic engine sound missing in the cabin
- More audible drivetrain or road noise
- Likely causes
- PossibleFuse, supply or ground of sound unit 1 faulty
- PossibleUnit or function not enabled or wrongly configured
- PossibleBus wiring or connector to the unit damaged
- RareSound control unit 1 internally failed
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.