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DTC U1103-87: Lost Communication with Stop and Start Control Module Missing Message [12/2019 - 10/2022]: 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 Memory Note
U1103-87 Lost Communication with Stop and Start Control Module Missing Message There is no communication between the ECM and engine stop and start ECU (1 trip detection logic).
  • ECM
  • Engine stop and start ECU
  • CAN Communication System
Does not come on DTC stored SAE Code: U1103
DTC for Mexico Models:
- Does not apply