DTC U0291-87: Lost Communication with Gear Shift Control Module "B" Missing Message [11/2021 - ]: Description
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The ECM receives signals from the shift actuator ECU (shift control actuator assembly) via CAN communication. When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before performing troubleshooting for each corresponding ECU or sensor.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| U0291-87 | Lost Communication with Gear Shift Control Module "B" Missing Message | No communication between the ECM and shift actuator ECU (shift control actuator assembly) for 1.24 seconds or more (1-trip logic) |
|
Comes on | DTC stored | SAE Code: U0291 |