P25EB code meaning
Supercharger Disconnect Clutch Circuit Range/Performance
Powertrain system Generic code P25xx codes Check engine light
What P25EB means
P25EB covers the electrical drive of the supercharger clutch when it is neither cleanly shorted nor open, yet the values do not fit the command – for example a coil current that is too small or too large for the applied duty cycle, or a signal that drops out briefly. According to Eaton, the clutch needs only a 12 V signal but is engaged with a modulated signal so that it bites smoothly, which gives the controller something to compare. Typical reasons are a coil with altered resistance, a corroded plug or a chafed wire. Hard faults to ground or voltage are reported separately as P25EC and P25ED. No carmaker documents this code publicly; the regulation behind it is CARB's rule for output components. The clutch may be switched off as a precaution.
P25EB at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 5 hours
- Clears after repairAfter a drive cycle
Symptoms of P25EB
- Check engine lamp on
- Jerky or missing supercharger engagement at low revs
Common causes of P25EB
- Most likelyClutch coil whose resistance has changed through heat or partial winding short
- PossibleCorroded or loose connector at the clutch or engine module
- PossibleWire chafed near the hot supercharger housing causing intermittent contact
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 P25EB 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. |
| EB | The exact fault in that area. |
What to do next
- Note P25EB 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 P25EB
What does P25EB mean?
P25EB means "Supercharger Disconnect Clutch Circuit Range/Performance". P25EB covers the electrical drive of the supercharger clutch when it is neither cleanly shorted nor open, yet the values do not fit the command – for example a coil current that is too small or too large for the applied duty cycle, or a signal that drops out briefly. It is a generic code, so it means the same on every make.
Is it safe to drive with P25EB?
Drive gently and only to a workshop. With P25EB the car can go into limp mode (reduced power) to protect itself.
Will P25EB fail an emissions test?
Yes, it can. P25EB 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 P25EB to fix?
Difficulty: medium. A typical repair takes 0.5 to 5 hours of work. This is a job for a workshop.
Will P25EB 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.