Normal/Performance Switch Circuit
General electrical fault on the Normal/Performance shift-pattern selector switch — lets the driver toggle between a comfort-oriented and a sport-oriented shift map. Without a valid input the TCM defaults to the Normal map.
Affected components
- Performance switch
- Wiring harness
Common causes
- High likelihood: Open or shorted switch wire
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.