Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is having trouble learning how to control one of the clutches in the transmission. It's like when you're trying to learn a new game, and you keep making the same mistake over and over.
The transmission control module (TCM) is unable to adaptively learn the engagement characteristics of Clutch B, which may affect the transmission's performance.
The P278F code indicates that the adaptive learning process for Clutch B in the transmission has reached its limit. The transmission control module (TCM) uses adaptive learning to fine-tune the engagement and disengagement of clutches for optimal performance. When the TCM cannot adapt further, it sets this code.
• Harsh or delayed shifting
• Transmission slipping
• Check Engine Light illuminated
• Worn or damaged clutch components
• Faulty transmission control module (TCM)
• Hydraulic fluid issues or leaks
Transmission Control Module (TCM): The computer that controls the transmission's functions.
Adaptive Learning: A process by which the vehicle's computer adjusts to changes in the transmission for optimal performance.
• Check for other related codes and address them first.
• Inspect the transmission fluid level and condition.
• Perform a transmission adaptive learning reset.
• Replace worn or damaged clutch components.
• Repair or replace the transmission control module (TCM).
• Flush and replace transmission fluid if necessary.
• OBD-II scanner
• Transmission fluid level gauge
• Basic hand tools
$500 - $2000
Moderate
• Ford Focus
• Volkswagen Jetta
• Chevrolet Cruze
• Regularly check and maintain transmission fluid levels.
• Avoid aggressive driving habits.
• Schedule regular transmission maintenance.
Transmission Performance
• Drive gently to avoid further damage.
• Schedule a diagnostic check with a professional mechanic.
Transmission issues may be covered under the powertrain warranty. Check with your vehicle manufacturer.
This code has become more common with the increased use of dual-clutch transmissions in modern vehicles.
Moderate – Addressing this issue soon can prevent further transmission damage.
Driving with transmission issues can lead to unsafe driving conditions. It's important to address this code promptly.
• Vehicle at operating temperature
• Transmission in adaptive learning mode
Clutch B is located within the vehicle's transmission system.
Q: Can I drive with a P278F code?
A: It's not recommended to drive for long periods with this code, as it can lead to further transmission damage.
Q: How is the adaptive learning reset performed?
A: An adaptive learning reset can be performed using a professional diagnostic tool or by a qualified mechanic.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
View on Amazon
Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.