P2788
Auto Shift Manual Adaptive Learning at Limit
Transmission (adaptive learning)
Generic OBD-II
Medium
What it means
P2788 means the transmission's adaptive learning (which trims clutch and pressure settings to keep shifts smooth as parts wear) has run out of adjustment range on an auto-shift-manual/clutch-to-clutch transmission. It's usually a sign of real wear or a hydraulic/pressure issue rather than a simple sensor glitch, and shift quality will degrade until it's addressed.
Medium
Can I keep driving? Usually yes, but expect harsher or slipping shifts; have it checked soon, as it often signals clutch or transmission wear reaching its adjustment limit.
Common symptoms
What you'll notice
- Harsh, flaring, or slipping gear changes
- Delayed engagement when selecting Drive or Reverse
- Transmission may enter a reduced-function (limp) mode
- Check-engine light on with the code stored
Common causes
Most likely first
- Worn clutches or transmission internals that have used up the adaptive rangeLikely
- Low, old, or contaminated transmission fluidCommon
- Faulty or drifting pressure-control solenoidCommon
- Internal hydraulic leak or restricted fluid passageLess often
How to diagnose & fix
Work through it in order
- Check transmission fluid level and condition first; correct and use the exact specified fluid.
- Scan for companion pressure/solenoid codes and review live line-pressure and adaptive data.
- Perform the manufacturer's adaptive relearn/reset after any fluid or repair work.
- If shifts remain poor, inspect solenoids and clutch wear; a rebuild may be needed at high mileage. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2788?+
Short-term driving is usually fine, but harsh or slipping shifts accelerate wear. Have it diagnosed soon to avoid a larger transmission repair.
Can I just clear P2788?+
Clearing and running an adaptive relearn may help briefly, but if clutches or fluid are worn it returns. Address the underlying wear or hydraulic cause.
Related codes
Often seen with P2788
Read & clear P2788 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX