P25FE is the umbrella code for the supercharger disconnect clutch: it says the clutch function has failed without naming whether it is stuck, slipping or electrically faulty. Those cases have their own codes – P25E9 and P25EA for the mechanical states, P25EB to P25ED for the control circuit – so a control unit that sets P25FE either does not distinguish them or uses it as a summary. The clutch lets the engine computer switch the belt-driven blower on for low-speed torque and off at idle, cruise or high revs to save friction losses, as Eaton describes for its clutched TVS supercharger. No carmaker documents P25FE publicly; CARB requires such supercharger components to be monitored. Expect weaker low-speed response and higher consumption.
Medium severity. Can I keep driving?Drive without demanding power and go to a repair shop soon. If you see a lot of blue smoke or hear a metallic noise, shut off the engine.
Symptoms
- Check engine lamp on
- Weak response at low engine speed
- Higher fuel consumption
Most likely causes
- Worn or seized clutch on the supercharger pulley
- Fault in the coil, wiring or connector of the clutch
- Engine control software that misjudges the clutch state
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: hard
- It can trigger limp mode.
- It affects emissions.
What each character of P25FE means
- P: Powertrain: engine and transmission
- 2: Generic code: same on every make
- 5: Speed and idle
- FE: Specific fault in that system
Frequently asked questions
Can I keep driving with code P25FE?
Drive without demanding power and go to a repair shop soon. If you see a lot of blue smoke or hear a metallic noise, shut off the engine.
What causes code P25FE?
The most common causes are: worn or seized clutch on the supercharger pulley; fault in the coil, wiring or connector of the clutch; engine control software that misjudges the clutch state.
Related codes
- P25E9Supercharger Disconnect Clutch Stuck Open
- P25EASupercharger Disconnect Clutch Stuck Closed
- P25EBSupercharger Disconnect Clutch Circuit Range/Performance
- P25ECSupercharger Disconnect Clutch Circuit Low
- P25EDSupercharger Disconnect Clutch Circuit High
Sources
- law.cornell.edu: 13 CCR 1968.2
- mobilityengineeringtech.com: 42215 sae ma 01421
- en.wikipedia.org: Twincharger
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.