Lost Communication With Digital Disc Player/Changer Module D
Your vehicle's main computer lost contact with the digital music player/CD changer module, like a phone losing signal to a wireless speaker. The two devices can't communicate, so the entertainment system won't work properly.
The ECU monitors CAN bus communication signals between the head unit and digital disc player module at regular intervals. It expects acknowledge responses within a specific timeframe; if the module fails to respond after multiple polling attempts, a communication loss is detected.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| CAN Bus Response Time | 50-200 ms | No response or >500 ms delay |
| Module Handshake Status | Active/acknowledged | Timeout or silent |
Code U0190 is a moderate fault. You can generally drive to a workshop, but avoid long trips or high-load driving (motorway, uphill towing) until it is diagnosed. If the code keeps returning after clearing, or if you notice the symptoms listed above worsening, do not delay professional diagnosis. Many moderate codes have multiple possible root causes — a mechanic with live OBD data can identify the exact fault more efficiently than part-by-part trial and error.
Once the fault is repaired, U0190 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.