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VW U155F00 Code – Gateway Module Signal Error
Limited
Safe to drive :
VW vehicles only
Applies only to :
Not applicable to :
This explanation does NOT apply to Audi, BMW, or other manufacturers.
Medium
Severity level :
When Does This Code Appear on the Vehicles
VW U155F00 shows after ECU detects inconsistent signals on CAN network.
What This Code means on the Vehicles
Indicates gateway module receives unexpected or missing signals from other modules.
Why This is different from a generic OBD2 Code
Standard OBD-II P0xxx codes do not cover inter-module communication errors.
Common Situations That Trigger This Code
Faulty ECU; Damaged CAN wiring; Short circuits after modifications.
What Will NOT Fix This Code
Clearing code without repairing wiring; Replacing unrelated modules.
How to Clear This Code on Vehicles
Inspect wiring harness, verify module connections, clear using VW diagnostic tool.
Related Manufacturer Specific Codes
VW U163F00; VW U1300
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