P25EA code meaning
Supercharger Disconnect Clutch Stuck Closed
Powertrain system Generic code P25xx codes Check engine light
What P25EA means
Here the clutch between pulley and supercharger rotors stays engaged although the engine computer wants the blower uncoupled, for example at idle or steady cruising. The blower then keeps turning, costs drive power and fuel, and its air has to be routed past it. Audi documents P25EA00 on the 2017–2019 Q7 with the 3.0 TFSI (engine code CREC): bulletin 2048402 reports the lamp on with this code stored in the engine module J623 and prescribes an engine software update with improved diagnostics, explicitly without replacing parts for this fault. A genuinely seized or welded clutch is still possible on other cars. The reverse case, a clutch that will not engage, is P25E9. Drivers mainly see the warning lamp and slightly higher consumption.
P25EA at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 6 hours
- Clears after repairAfter a drive cycle
Symptoms of P25EA
- Check engine lamp on
- Higher fuel consumption at part load
- Supercharger whine also at idle or cruising
Common causes of P25EA
- Most likelyEngine control software misjudging the clutch state (Audi Q7 3.0 TFSI, bulletin 2048402)
- PossibleClutch plates stuck together by wear debris, corrosion or overheating
- Less likelyClutch coil kept energised by a wiring fault or a stuck driver stage
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Supercharger clutchClutch solenoidClutch pulley
What each part of P25EA means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 5 | Area: vehicle speed, idle control and auxiliary inputs. |
| EA | The exact fault in that area. |
What to do next
- Note P25EA and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P25EA
What does P25EA mean?
P25EA means "Supercharger Disconnect Clutch Stuck Closed". Here the clutch between pulley and supercharger rotors stays engaged although the engine computer wants the blower uncoupled, for example at idle or steady cruising. It is a generic code, so it means the same on every make.
Is it safe to drive with P25EA?
Drive gently and only to a workshop. With P25EA the car can go into limp mode (reduced power) to protect itself.
Will P25EA fail an emissions test?
Yes, it can. P25EA is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P25EA to fix?
Difficulty: medium. A typical repair takes 0.5 to 6 hours of work. This is a job for a workshop.
Will P25EA clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.