Powertrain, generic (extended)

P25FE Supercharger Disconnect Clutch

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

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.

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

Symptoms

  • Check engine lamp on
  • Weak response at low engine speed
  • Higher fuel consumption

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–3,000
Time1–6 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

supercharger clutchclutch solenoid

Related codes

P25E9P25EAP25EBP25ECP25ED

References: law.cornell.edu, mobilityengineeringtech.com, en.wikipedia.org.