Clutch A Pressure Charge Performance
What it means
P2855 means clutch A isn't building or holding its commanded charge (fill) pressure the way the transmission controller expects — the clutch that engages drive on a dual-clutch or automated gearbox. The usual result is clutch shudder, slipping, or hesitant take-off, and in worse cases limp mode. It can stem from a worn clutch pack, a faulty pressure/charge solenoid, or low/degraded fluid, so check fluid and pressure control before assuming the clutch itself is worn out.
Can I keep driving? Usually yes but degraded — expect clutch shudder, slipping, or hesitant take-off, and possible limp mode; get it fixed before the clutch wears further.
Common symptoms
What you'll notice
- Check-engine light on
- Clutch shudder or slipping on take-off
- Hesitant or delayed engagement
- Harsh shifts or limp mode in severe cases
Common causes
Most likely first
- Worn clutch pack that can't hold the commanded charge pressureLikely
- Faulty clutch pressure/charge control solenoidCommon
- Low or degraded transmission/clutch fluidCommon
- Valve body or fluid-passage restriction affecting clutch fillLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and check for related clutch or pressure-control codes.
- Check transmission fluid level and condition; service fluid and filter if due or contaminated.
- Use a scan tool to compare commanded vs. actual clutch charge pressure during engagement.
- Test the clutch charge/pressure solenoid electrically and mechanically; replace if faulty.
- If pressure control is good but the clutch still slips, the clutch pack likely needs replacement.
FAQ
Quick answers
Is it safe to drive with P2855?+
Can I just clear P2855?+
Related codes
Often seen with P2855
Read & clear P2855 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.