P28EF

Engine Disconnect Clutch Actuator Performance/Stuck Off

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Gear shifting problems
Vibrations when starting off
Transmission transition to emergency mode
Check Engine Light Illuminates
Reduced engine power

Causes

Mechanical jamming of the clutch drive
Open or short circuit in control circuit
Drive solenoid valve malfunction
Problems with the transmission control unit
Worn or damaged mechanical drive components

How to Fix

Check the integrity of the wiring and connectors of the clutch drive
Diagnose the operation of the drive solenoid valve
Check the mechanical components of the drive for jamming
Scan the transmission control unit for errors
If necessary, replace the clutch drive

Related codes

P28F0 P28F1 P0805