PaulGo

It could be the throttle body assembly that is causing the stuttering. Have you brought your car into Ford to have the free software update to help with the mileage problem?

This fix only works on 2010-2012 Ford Fusion Hybrid, 2010-2012 Lincoln MKZ Hybrid, & 2010-2012 Mercury Milan Hybrid. This was caused by Ford not programming these model year cars correctly. It was fixed in the later model year cars.

You are correct. The CSP will take care of the problem without the age fix.

I did not undo the age fix. The dealer installed 22G04 on both cars on top of the age fix.

After a week with the dealer installed CSP #22G04 the gas mileage is slightly better than with just the age fix. Applying the age fix has no impact on the dealer applying the CSP.

On Wednesday, I had my first 2010 Mercury Milan with the CSP. To my surprise, they also did the driver's side airbag recall. So far, the results are excellent, although it's hard to tell the difference between this CSP and the age fix from this thread. Today I had my other Mercury Milan done but no driver's side airbag replacement (on order maybe next week). Both cars have about 55 thousand miles, and the average mileage was slightly over 38mpg during the summer months with the age fix.

I called my dealer and gave them the CSP #22G04. They verified it applies to my two 2010 Mercury Milan Hybrids, and I set up an appointment for them to do the work. The age fix I did two years ago works very well, and I hope I get at least as good hybrid performance after I visit the dealership. FusionDiffusion has posted a comment on a topic, 2010 - 2012 Fusion Hybrid High Voltage Battery TSB at 10 Years of Age FYI there is a new customer satisfaction program for this that came out today, the program number is 22G04. You can now have this BECM/PCM update performed free of charge through Sept 30, 2023. Letters will be sent out in a couple weeks. You are eligible for a refund if you paid to have this performed at a dealer previously, and can provide documentation. I think every owner will want this done. Title: Application Performance Upgrade 22G04 Certain 2010 – 2012 Model Year Fusion / MKZ / Milan Hybrid Vehicles Hybrid Battery Reduced Electric Vehicle Operation BECM and PCM Software Update https://fordfusionhybridforum.com/topic/13380-2010-2012-fusion-hybrid-high-voltage-battery-tsb-at-10-years-of-age/page/3/?tab=comments#comment-117299

Thank you for coming up with the "fix". Before I found your fix, I was getting the run around from Ford denying there was a problem even though I have brought my car into a Ford dealership and according to their diagnostics everything was according to spec. When Ford finally realized and offered their solution, they should have provided it at no cost.

I did the fix on my two vehicles about 18 months ago. During the summer I get about 38mpg and less in the winter months which is what I was getting when the original programming was working. For the time before I discovered the fix my mileage was in the low 30s.

The procedure only works for 2010 to to 2012 Ford hybrids. These cars were not properly programmed to maintain the hybrid functionality after nine years.

In cold weather when my two cars is warming up it will go to Full charge, but when driving it usually stays in the middle. In warm weather they goes into the Hybrid mode quickly. In the warm weather I average about 38mpg as a mixture and highway and local driving.

About 19 months for me on my two 2010 Mercury Milan Hybrids since I applied your fix. Both cars are working fine with no issues.

With all the problems owners have been having Ford should offer the fix for free. For man owners in not only a gas consumption issue bet a safety issue.

They don't sell the transmission but they sell the patented technology to the auto manufacturer. The auto manufacture will then use the technology in the transmission the build specifically for the cars they produce.

Unique devices can and should have patents. This applies to electronics, cars and many other devices. https://patents.google.com/patent/WO2016082776A1/en Antonov As of autumn 2005, the Antonov Automotive Technology BV Plc company has sued Toyota, the Lexus brand mother company, over alleged patent infringement relating to key components in the RX 400h's drivetrain and the Toyota Prius hybrid compact car. The case has been pending in secret since April 2005, but settlement negotiations did not bring a mutually acceptable result. Antonov eventually took legal recourse in the German court system, where decisions are usually made relatively swiftly. The patent holder seeks to impose a levy on each vehicle sold, which could make the hybrid SUV less competitive. Toyota fought back by seeking to officially invalidate Antonov's relevant patents. The court motion in Microsoft Word document format can be read here.[36] On 1 September 2006 Antonov announced that the Federal Patent Court in Munich has not upheld the validity of the German part of Antonov's patent (EP0414782) against Toyota. A few days later, a court in Düsseldorf had ruled that the Toyota Prius driveline and the Lexus RX 400h driveline do not breach the Antonov hybrid CVT patent.[37] Ford Ford Motor Company independently developed a system with key technologies similar to Toyota's HSD technology in 2004. As a result, Ford licensed 21 patents from Toyota in exchange for patents relating to emissions technology.[38] Paice Paice LLC received a patent for an improved hybrid vehicle with a controllable torque transfer unit (US patent 5343970, Severinsky; Alex J., "Hybrid electric vehicle", issued 1994-09-06) and has additional patents related to hybrid vehicles. In 2010 Toyota agreed to license Paice's patents; terms of the settlement were not disclosed.[39] In the settlement "The parties agree that, although certain Toyota vehicles have been found to be equivalent to a Paice patent, Toyota invented, designed and developed the Prius and Toyota’s hybrid technology independent of any inventions of Dr. Severinsky and Paice as part of Toyota’s long history of innovation".[40] Paice earlier entered into an agreement with Ford for the license of Paice's patent.[41] https://en.wikipedia.org/wiki/Hybrid_Synergy_Drive#Patent_issues

All my visits to my Ford dealership were last year before I applied Allen"s fix. I applied Allen's fix about October of 2019.

Judging by the they way the technicians at my dealership attempted to "fix" one of my two 2010 Mercury Milan vehicles I just think they will hook the car up to the computer and apply the Ford TSB. They really showed no interest in going beyond what was instructed for them to do and they kept on coming back and saying the car was fixed when it was not. I brought one of cars back to the dealership several times and they had it in the shop for almost two weeks!

Did they tell you what TSB 20-2142 did to fix the problem? Also, did they charge you for doing the TSB?

I am also an IT professional for over 30 years. Ford did not gain anything by doing this, but for many months Ford denied the problem and kept stating the cars were operating normally! I escalated via my Congressman to Fords top management and was called by the Regional manager. They still stated that my two cars were operating normally. One car was in Ford service intermittently for over two weeks while they tried to fix the problem but again after everything they tried they could not recognize the problem. My belief is Ford initially did not want to dedicate the resources to fix the problem on a ten year old vehicle. I believe the problem was sloppy programming and testing of the program. The factors that should have been considered is not only the age of the HV battery but the miles (or hours of use) and monitoring the condition of the battery. Giving the owners the runaround which cost some owners a considerable amount of money is unforgivable!

I agree with you allen84. Will Ford's fix be more effective than your fix? I would like to know what specifically they did in their fix. If it improves HV battery life while giving full hybrid functionality for the life of the car that would be great. If it screws things up where it puts the car into a semi-hybrid mode as a one size fits all solution that would not be good. If is a complete re-write then re-applying your fix may not be possible. It could also be possible that all Ford did was set the HV age counter back as you did.

The Milan hybrid was only produced in 2010 and 2011. I have two 2010 Milan hybrids. The problem is the computer before the "fix" will not properly utilize the HV battery so almost all the time it will stay fully charged and not go into the hybrid mode. When working properly the car should go into the hybrid mode at speeds under 47mph when braking, at idle and when driving with very light pedal pressure after the engine has warmed up.

Because of the limited number of Ford hybrids sold during 2010 to 2012 (and the age of our vehicles) I believe Ford has given this a very low priority. Also Ford has severe financial difficulties and from what I have read they many face bankruptcy. So Ford just may not have the resources and hope the owners just give up.

Perhaps because my two 2010 Mercury Milan Hybrid cars only had about 44,000 miles on them when I took the cars out of storage because of the air bag recall I did not notice any hesitation but the hybrid mode disappeared. I initially blamed it on the long term storage because I could not imaging Ford would program this stupid behavior. I went though the same frustrations with my dealership because the computer diagnostics did not show any error codes. I did write a email to the head of Ford but I got no response. I did contact NHTSA and filed a complaint. I don't thing Ford is putting a high priority about developing a permanent fix since it is taking so long. Maybe they just hope to quiet everyone and avoid doing anything. I thing thing it might be helpful in writing your Congressman or Senator to apply some legislative pressure. I did apply the "fix" and I am very pleased with the results.

With Ford Motor Company having financial difficulties and a possible bankruptcy I wonder how much resources they are devoting to coming up with a fix to the problem they have acknowledged for our hybrids. Why Bankruptcy Is a Forgone Conclusion for Ford Motor Company https://www.ccn.com/why-bankruptcy-forgone-conclusion-for-ford-motor-company/

2010 Ford Fusion VIN 4757 Hybrid Electric Vehicle Battery Test Results - Department of Energy Conclusion: The Ford Fusion, with VIN 4757, experienced a 3.8% degradation in battery capacity and stayed below DOE targets for all aspects of the HPPC test over the duration of 160,000 miles of fleet testing. From this result I would assume the 9 year cut-off that Ford did on the hybrid function is much too conservative. Full hybrid functionality could extend for many more years without risk of HV battery problems. https://energy.gov/sites/prod/files/2014/02/f7/batteryfusion4757_0.pdf