Gear Shift Control Module B Overtemperature
Gear shift control module B reports junction temperature above protection threshold.
Affected components
- Gear shift control module b
- Wiring harness
Common causes
- High likelihood: Ambient temperature too high
- Medium likelihood: Sustained high module load
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
- Reduced-power or limp mode may occur
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.