What it means
The supercharger disconnect clutch is detected as stuck open, so it may fail to engage when commanded. Reduced supercharger output or engine performance may result.
At a glance
- Usually lights the check-engine light
How it works
A supercharger disconnect clutch couples the engine drive to the supercharger when boost is needed. The control module checks whether the clutch engages when commanded; this code indicates it detects the clutch remaining open, which can leave the supercharger unable to provide its expected output.
Common causes
Most likely first.
- Open electromagnetic clutch coil
- Worn friction surfaces leave the air gap too large to attract
- Corroded armature plate stuck open
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
How to diagnose it
- Review freeze-frame data and scan-tool commands to confirm the conditions when engagement was requested and whether the clutch feedback showed it remained open.
- With the engine off, inspect the clutch connector, wiring, and accessible armature area for corrosion, damage, or obstruction.
- Check the clutch coil circuit for continuity and shorts, following the manufacturer's procedure, because an open coil cannot create the magnetic force to engage.
- Measure clutch air gap and inspect the friction surfaces for wear or corrosion against the manufacturer's specification.
- If wiring, coil, and air gap are sound, test the control driver and clutch engagement under the manufacturer's procedure.
Common fixes
- Clean and secure corroded clutch connector terminals or repair damaged wiring.
- Replace an open supercharger clutch coil.
- Correct excessive clutch air gap or replace worn friction components as specified.
- Free or replace a corroded armature plate that cannot move into engagement.
Can I keep driving?
The code alone does not establish a transmission fault; avoid demanding acceleration because boost may be reduced. If the vehicle also shifts harshly, enters limp mode, or loses power enough to make traffic unsafe, stop driving and arrange diagnosis.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.