Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car's computer is having trouble learning how to shift gears smoothly. It's like when you're learning to ride a bike and can't quite get the hang of it yet.
The transmission control module (TCM) is responsible for learning and adapting to the driver's habits to optimize gear shifts. When it reaches its learning limit, it triggers this code.
The P2788 code indicates that the transmission control module has reached its adaptive learning limit. This means the TCM can no longer adjust the shift patterns to improve performance, often due to wear or a mechanical issue within the transmission.
• Harsh or erratic shifting
• Transmission slipping
• Check Engine Light illuminated
• Worn transmission components
• Faulty transmission control module
• Software issues within the TCM
Transmission Control Module (TCM): A computer that controls the transmission's functions.
Adaptive Learning: The process by which the TCM adjusts to the driver's habits to optimize performance.
• Perform a diagnostic scan to verify the code.
• Inspect transmission fluid levels and condition.
• Check for software updates for the transmission control module.
• Reprogram or update the transmission control module software.
• Replace worn transmission components.
• Reset the adaptive learning settings in the TCM.
• OBD-II scanner
• Transmission fluid dipstick
• Diagnostic software
$200 - $800
Moderate
• Ford Focus
• Chevrolet Cruze
• Honda Civic
• Regular transmission fluid changes
• Routine maintenance checks
• Keeping software up to date
Transmission Performance
• Avoid aggressive driving until resolved.
• Schedule a service appointment promptly.
Check with your manufacturer, as some powertrain warranties may cover transmission issues.
This code has become more common with the advent of adaptive learning transmissions in modern vehicles.
Moderate – Addressing this issue promptly can prevent further transmission damage.
Driving with a malfunctioning transmission can lead to unsafe driving conditions.
• Vehicle must be driven under normal conditions.
• Ensure the engine and transmission are at operating temperature.
The transmission control module is typically located near the transmission or under the hood, depending on the vehicle model.
Q: Can I drive with a P2788 code?
A: It's possible, but not recommended, as it can lead to further transmission damage.
Q: Will resetting the code fix the problem?
A: Resetting the code may temporarily clear the warning, but it won't fix the underlying issue.
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