Gear Shift Forward Actuator Circuit Range/Performance
The gear shift forward actuator circuit reports a range/performance fault. Forward gear engagement is impaired.
Affected components
- Gear shift forward actuator
- Wiring harness
- Tcm
Common causes
- High likelihood: Actuator fault
- Medium likelihood: Wiring fault
- 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
- 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.