Shift Fork "B" Actuator Control Circuit Driver Current/Temperature Too High
The output driver for shift fork B actuator reports current or junction temperature above its protection threshold. Stalled actuator or short-circuit fault.
Affected components
- Shift fork actuator b
- Tcm
Common causes
- High likelihood: Short to ground in actuator wiring
- Medium likelihood: Shift fork mechanically jammed — actuator stalls
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
Related codes
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.