Up and Down Shift Switch Circuit Range/Performance
The up/down shift switch reports a range/performance fault. Manual shift requests via paddle or selector cannot be reliably interpreted.
Affected components
- Up down shift switch
- Wiring harness
- Tcm
Common causes
- High likelihood: Switch contacts aged
- Medium likelihood: High-resistance contact
- 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.