P2789 OBD-II Trouble Code: Clutch Adaptive Learning at Limit

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P2789 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P2789 code

P2789 is a diagnostic trouble code (DTC) for "Clutch Adaptive Learning at Limit". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $69.99. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$69.99$20.00
Toyota$69.99$20.00
BMW$69.99$20.00
SCHEDULE P2789 DIAGNOSTIC Get a fair and transparent estimate upfront

Check Engine Light

P2789 code definition

When the P2789 code applies to vehicles with dual clutch automated manual transmissions. When it is saved, it indicates that the powertrain control module (PCM) has detected an abnormality in the clutch’s adaptive learning system and that some error has occurred in the clutch system’s adaptive learning capabilities.

What the P2789 code means

To adapt to the vehicle owner’s style of driving, the dual clutch system, controlled by the vehicle’s computer, learns and adapts, thanks to input from a number of actuators and sensors. When the clutch adaptive learning system is unable to continue to learn and adapt, the P2789 code is saved, alerting the driver through an illuminated Check Engine Light or MIL (Malfunction Indicator Light), that the clutch adaptive learning system is not performing normally.

What causes the P2789 code?

The P2789 code is caused when the desired normal amount of adaptive response exceeds its predetermined limit. Depending upon the make and model of the vehicle, the P2789 code may not be stored until several failure cycles have occurred, but after this the code will be stored and the MIL or Check Engine Light will illuminate.

What are the symptoms of the P2789 code?

There may be no noticeable symptoms besides the illuminated MIL. This symptom, however, may also come alongside others, including:

  • Engine stall when the vehicle comes to a complete stop
  • Hard shifting
  • Clutch and/or transmission slippage
  • Lowered fuel efficiency
  • Transmission overheating
  • Failure of the clutch to engage or disengage

Other codes may also accompany the P2789 code, including DTC codes for:

  • Gear ratio slippage
  • Torque converter clutch
  • Transmission slippage
  • Clutch lock up

How does a mechanic diagnose the P2789 code?

To diagnose a P2789 code, a mechanic will use a code reader (or scanner) and a digital volt/ohmmeter. Upon scanning for Diagnostic Trouble Codes, other codes related to the clutch and transmission system should be diagnosed and fixed first, as one or more of these may be the cause of the P2789 code.

Mechanical clutch failure is a common cause of the P2789 code. So, after checking for other codes, the mechanic will diagnose and repair any defective solenoids, sensors, and/or actuators. The mechanic will also take steps to check for insufficient fluid pressure, as well as transmission diagnostics.

Common mistakes when diagnosing the P2789 code

The most common mistakes when diagnosing the P2789 code generally involve overlooking malfunctions in the shift solenoid, pressure control solenoid, and/or wiring. When these are missed, a clutch or transmission replacement or rebuild is often done when it is not called for, costing the vehicle owner more while failing to solve the problem.

How serious is the P2789 code?

While some instances of the P2789 code come with no symptoms at all, this is a serious problem that can get worse if left undiagnosed. Hard shifts, a clutch that will not disengage or engage, and/or an engine that stalls at idle can put the driver in significant danger, depending on where and when these malfunctions happen.

What repairs can fix the P2789 code?

Some common repairs for the P2789 code include:

A test must be done after each repair to determine whether or not the mechanic has found the cause of the P2789 code.

Additional comments for consideration regarding the P2789 code

Failure to continue to learn and adapt to your driving style may not seem like a major problem, but considering how many other issues can be triggered by the P2789 code and codes associated with it, it is definitely not one to leave alone. An undiagnosed P2789 code problem could put you in serious danger and could cause other problems for your transmission and clutch. If you’ve experienced one or more of the symptoms of this code and your MIL or Check Engine light has illuminated, you should get it diagnosed and repaired immediately.

Need help with a P2789 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

trouble codes
Check Engine Light
P2789

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P2789 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

4,240

Rating Summary
3,884
174
45
26
111
3,884
174
45
26
111
David

David

37 years of experience
7 reviews
David
37 years of experience
David is AWESOME! He managed to troubleshoot misleading code errors and get to the root of the problem quickly. I know that if I'd gone to the dealer or a shop, I likely would have been fleeced for unnecessary work due to the codes that were thrown by my car. We will be requesting him in the future for all of our cars' needs. Thanks David!
2008 SATURN OUTLOOK - CHECK ENGINE LIGHT IS ON - TUCSON, ARIZONA
Henry

Henry

32 years of experience
110 reviews
Henry
32 years of experience
Henry was very thorough and professional. Very pleased with his service.
2013 CHEVROLET MALIBU - CHECK ENGINE LIGHT IS ON - SICKLERVILLE, NEW JERSEY
Dia

Dia

30 years of experience
30 reviews
Dia
30 years of experience
Very thorough and knowledgeable. Courteous and friendly. Gave us options for repairs as far as what needs to be done right away and what can wait.
2005 CHRYSLER CROSSFIRE - CHECK ENGINE LIGHT IS ON - JONESBORO, GEORGIA
Jay

Jay

34 years of experience
566 reviews
Jay
34 years of experience
Very nice man real true mechanic.... I will use him again .
2005 FORD F-150 - CHECK ENGINE LIGHT IS ON - COLTON, CALIFORNIA

More related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Buy Fuel Treatments
Adding a fuel additive to your gas tank when you fill up is one way to clean vital engine parts of deposits, improve the performance of your engine,...
Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...

Related questions

Q: My car jerks slightly when I'm at a steady speed or trying to stay at a constant speed only around 40mph to 50 mph

In the future, please include the codes as they can help use pinpoint and give you a more accurate answer. The surging you feel while under light throttle, which is what is happening at a cruise, is due to...

Q: Why is my car driving fine at first and then I hear a ticking sound whenever I press the gas? I also have hard brakes and steering.

Hi there. Typically when the Check Engine Light comes on, it indicates that the on board computer has detected an error code from either a sensor or a mechanical part on the vehicle. The ticking issue might be caused by...

Q: 2010 Mini Cooper S - P0974 Trouble Code: Shift Solenoid A Control Circuit High

Hello - there are known issues with the valve body wearing out faster than should be normal on this transmission. I would check with a reputable transmission shop in your area for a rebuilt valve body. these are available with...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com