Volkswagen Golf
U0121
The U0121 code indicates a communication issue between the Engine Control Module (ECM) and the Transmission Control Module (TCM) in a Volkswagen Golf Seventh Generation (2013-2020). This could lead to improper transmission operation or performance issues.
2 SolutionsU-CodeNetwork
U
Error Code Type
Network
Components
2 affected
ElectricalBrakes
Symptoms
10 common
- •Check engine light illuminated
- •Erratic transmission shifting or inability to shift
- •Loss of power or poor acceleration
- +7 more
Most Affected Generations
1 generation
MK8
2
Top Affected Components
2 components
Electrical
1
Brakes
1
Severity Levels
1 level
high
2
Quick Facts
2
Total Solutions
2
Affected Components
10
Common Symptoms
1
Generations
All Solutions
Showing 2 of 2 solutions for error code U0121 across all generations.
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