Lost Communication With Drive Motor Control Module
Your car's main computer has lost its connection to the motor control module, like a phone losing signal to a tower. Without this communication, the engine cannot receive proper commands and will run poorly or not start.
The main ECU continuously communicates with the Drive Motor Control Module via the CAN bus network to send fuel injection and ignition timing commands. The system monitors for valid data messages and timeouts on this communication link. If no valid response is received within a set time window, the fault is triggered.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| CAN Bus Message Response Time | < 100 milliseconds | > 100 milliseconds or no response |
| Module Handshake Signal | Present and valid | Missing or corrupted for > 1 second |
Code U0110 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, U0110 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.