Upshift Switch Circuit Range/Performance
The upshift switch (paddle or steering-wheel button on Tiptronic-style controls) signal is implausible. Stuck or noisy contacts.
Affected components
- Upshift switch
- Steering wheel controls
Common causes
- Medium likelihood: Contamination on switch contacts
- Medium likelihood: Worn switch contacts
- Low likelihood: Sensor element aged beyond calibration window
Possible symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Diagnostic notes
- The malfunction indicator lamp may illuminate
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.