What Does P2788 Mean?
The transmission control module's adaptive learning parameters for the automated manual shift system have reached their maximum correction limits. The system can no longer compensate for wear or changes in component behavior.
Common Causes
35%
Excessive clutch wear requiring adaptation beyond normal parameters
30%
Worn shift actuator or shift mechanism components causing inconsistent operation
20%
Hydraulic system degradation with fluid leaks or pressure loss
10%
Incorrect transmission fluid level or contaminated/wrong fluid type
5%
Software calibration issue or corrupted adaptive memory in TCM
Diagnostic Steps
1
Step 1: Review adaptive learning values using advanced scan tool to identify which parameters are at limits
2
Step 2: Check transmission fluid level, condition, and verify correct specification
3
Step 3: Perform mechanical inspection of clutch engagement point and shift quality during test drive
4
Step 4: Test hydraulic system pressure and actuator operation throughout full range of motion
5
Step 5: Reset adaptations and perform relearn procedure; monitor how quickly limits are reached again
Estimated Repair Cost
$200 - $2,800
Parts + labor, varies by vehicle and location
The transmission control module's adaptive learning parameters for the automated manual shift system have reached their maximum correction limits. The system can no longer compensate for wear or changes in component behavior.
The most common cause of P2788 (Auto Shift Manual Adaptive Learning at Limit) is: Excessive clutch wear requiring adaptation beyond normal parameters
Typical repair costs for P2788 range from $200 to $2,800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May experience poor shift quality, harsh engagement, or inconsistent clutch operation. Safe to drive but requires prompt attention.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2788 to identify the root cause.
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Quick Info
Category
Powertrain
System
Automated Manual Transmission Control
Difficulty
Type
Generic (SAE)
Recommended Tools
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