Gate Select Control Error
The TCM detects that the gate select actuator does not reach the commanded position within tolerance. Mechanical bind, weak actuator, or sensor offset.
Affected components
- Gate select actuator
- Gate select position sensor
- Tcm
Common causes
- High likelihood: Selector mechanism binding
- Medium likelihood: Actuator force degraded
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.