Volkswagen Passat
U1121
The U1121 code in a 2015-2022 Volkswagen Passat B8 indicates a communication issue between control modules, often related to a loss of signal from a particular module.
1 SolutionU-CodeNetwork
U
Error Code Type
Network
Components
1 affected
Electrical
Symptoms
5 common
- •Check engine light illuminated
- •Erratic behavior of electronic components
- •Loss of functionality in certain features (e.g., adaptive cruise control, parking sensors)
- +2 more
Most Affected Generations
1 generation
B9
1
Top Affected Components
1 component
Electrical
1
Severity Levels
1 level
high
1
Quick Facts
1
Total Solutions
1
Affected Components
5
Common Symptoms
1
Generations
All Solutions
Showing 1 of 1 solution for error code U1121 across all generations.
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