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GM U1102 Code – Multi-Module Communication Error
Limited
Safe to drive :
GM vehicles only
Applies only to :
Not applicable to :
This explanation does NOT apply to other brands.
Medium
Severity level :
When Does This Code Appear on the Vehicles
GM U1102 shows when modules report inconsistent data to gateway.
What This Code means on the Vehicles
Indicates network inconsistency affecting multiple modules.
Why This is different from a generic OBD2 Code
Generic scanners cannot identify multi-module UDS communication errors.
Common Situations That Trigger This Code
Faulty modules; Wiring issues; Voltage instability.
What Will NOT Fix This Code
Ignoring UDS network errors.
How to Clear This Code on Vehicles
Inspect and replace faulty modules; verify wiring; clear using OEM tool.
Related Manufacturer Specific Codes
GM U1100; GM U1101
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