P25ED code meaning
Supercharger Disconnect Clutch Circuit High
Powertrain system Generic code P25xx codes Check engine light
What P25ED means
With P25ED the voltage on the clutch control line sits above the expected level. Common reasons are a wire shorted to battery voltage, or – on a ground-switched coil – an open coil or broken lead, because the line is then pulled up to supply voltage. A short to voltage can overload the driver stage, which protects itself by switching off. In practice the supercharger then stays uncoupled and only the turbocharger delivers boost, so the car feels sluggish from standstill. Volvo's twincharged T6 Drive-E and Audi's 3.0 TFSI are examples of engines with such a clutch, but neither has published this code. Thresholds are not public; CARB prescribes circuit checks for such outputs. Low-side faults are P25EC, implausible values P25EB.
P25ED at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P25ED
- Check engine lamp on
- Sluggish pull-away, supercharger does not cut in
Common causes of P25ED
- Most likelyControl wire shorted to battery voltage
- PossibleOpen clutch coil or broken wire on a ground-switched circuit
- Less likelyOutput stage in the engine control module damaged
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Supercharger clutchClutch solenoidWiring harness
What each part of P25ED 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. |
| ED | The exact fault in that area. |
What to do next
- Note P25ED 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 P25ED
What does P25ED mean?
P25ED means "Supercharger Disconnect Clutch Circuit High". With P25ED the voltage on the clutch control line sits above the expected level. It is a generic code, so it means the same on every make.
Is it safe to drive with P25ED?
Drive gently and only to a workshop. With P25ED the car can go into limp mode (reduced power) to protect itself.
Will P25ED fail an emissions test?
Yes, it can. P25ED 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 P25ED to fix?
Difficulty: medium. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P25ED clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.