P25EBSupercharger Disconnect Clutch Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- 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.
- What you may notice
- Check engine lamp on
- Jerky or missing supercharger engagement at low revs
- Likely causes
- 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
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.