DTC U0120-87: Lost Communication with Starter / Generator Control Module Missing Message [10/2023 - ]: Description
The ECM and engine stop and start ECU send and receive signals via CAN communication.
If a communication error occurs between the ECM and engine stop and start ECU, the ECM stores this DTC.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | DTC Output from | Priority | Note |
|---|---|---|---|---|---|---|---|
| U0120-87 | Lost Communication with Starter / Generator Control Module Missing Message | There is no communication between the ECM and engine stop and start ECU (1 trip detection logic). |
|
Comes on | Engine | B | SAE: P0120 |