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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 assembly send and receive signals via CAN communication.

If a communication error occurs between the ECM and engine stop and start ECU assembly, 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 While the ignition switch is ON, there is no communication between the ECM and engine stop and start ECU assembly for 1.16 seconds or more (1-trip detection logic).
  • ECM
  • Engine stop and start ECU assembly
  • CAN communication system
 Does not come on DTC stored SAE Code:
U1103
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