Its regarding an S-Type 2001 3.0 Sports Auto model which just had its 70K service (66K on the clock) -- today while

Expert's Assistant chatimg
Customer: Hi there, its regarding an S-Type 2001 3.0 Sports Auto model which just had its 70K service (66K on the clock) -- today while driving throuh a tunnel in the day time the lights automaticaly came on as they do but I also noticed the malfuction light comming on at the same time which stayed on. Now everytime I start the car it stays on. As far as I can see all the bulbs are OK -- any ideas? The other problem seems to be the lurch (discribed here ttp:// I've had my gearbox replaced four times! Yes you read it correctly 4 times but the problem kept comming back only after 5-10K of driving on every new gearbox!! Strange thing at every service they reflash the TCM which results in car running smoothly from a few days to few months.. I've been told its someting to do with the learning gearbox fitted to these cars.   When the lurch comes back the ride quality degrades but not when cruise control is on! Any ideas
Answered by Richard in 2 hours 13 years ago
15+ years of experience

19,890 satisfied customers

Specialities include: Automotive Mechanic, Small Engine Repairs, Auto Body Repairs, Diesel Engine Repairs

Hello and welcome to


What is your VIN or chassis number? Was a diagnostic done and if so what was the stored code?


Hello Richard,


VIN: AC02L21FM43513 and no no diagnostics has been done for the malfunction light as yet but in the past all of the four transmissions were replaced under warranty by the dealership without giving me any diagnostics codes.. One thing I'd like to mention is that when the lurch issue comes back the car drives like it is fitted with unevenly rounded wheels i.e. shakes and excessive movement felt inside the car the way I can describe it as the brakes getting engaged all by their own.. now when I put the car in cruise control mode on a motorway and its doing the same speed as I was doing before it al feels very different ride turn very smooth. Could it be something to do with the DSC?? works perfect in cruise control mode but not without it?? Feel free to ask any more questions and I'll be happy to answer them as best I can.



What I think you are feeling is a torque converter shudder. If you have the 6 speed ZF then the TCM needs to be reprogrammed with different software. The software is a coded access software where the dealer will need to call the ZF engineer to get the code from them. I would like to know the diagnostic codes which may be on the paper work you received. I am trying to run your VIN as it may have the Ford transmission in it which was in the 2000-2003 (US) and the 2000-2002 (UK) but I am having trouble running it on the Jag site.

Many tanks for your answer Richard. If I may I would like to ask a couple of more questions regarding this.

The torque converter shudder as you called it.. is there a reason why it is not felt in cruise control mode? Would this shudder result in the malfunction indicator lamp getting illuminated as per TSB S307-10?

As far as I know the car is fitted with the Ford transmission which I read somewhere can't be reprogrammed but yet at every service reprogramming of the TCM resolves the lurch issue be it just for a few weeks to a few months!! Now the car was preowned by someone at Jaguar UK and we bought it used 6 months old.. the car was registered in Feb 2002 which makes me think it may be fitted with the ZF as it exhibits exactly the same issues people seem to get with the ZF transmissions.. is there an easy way to tell wich transmission is fitted to mine?

Sometimes you can get the code P0741 logged but not all the time. When using the cruise the PCM implements a cruise strategy to reduce "gear hunting". SInce the engine light did come on that code may have been logged. Usually the gearbox fault light will also come on when a torque converter code is stored. The transmission can be reprogrammed but it does not have a seperate TCM. Everything is incorporated in the PCM. The transmission will adapt the pressure control on engagement into gear only. To reset these engagement adapts the PCM will need to be reprogrammed then a sequence of engagements into reverse and drive are done so the PCM can learn the pressures. For the ZF the TCM is inside the transmission and can be reprogrammed and we can also force the adaptations on the road with the Jag IDS. You need to look under your vehicle at the transmission. If you have a thin black plastic trans pan you have a ZF. If it's a deep metal pan then you have the Ford unit.

Read less
19,890 satisfied customers
15+ years of experience
+ years of experience

19890 satisfied customers



Licensed mechanics

31,131 satisfied customers

Pearl avatar
Steve Pearl, Mechanic's Assistant
14 Mechanics are online right now.
Related Car Questions
Trying to connect new selector cable to trans. I have the
Randall J
16,099 Satisfied Customers
I have a Range Rover 2010 Sport supercharged, did full
CEO/Lead Technician
2,160 Satisfied Customers
My 1994 3/4 XJSHE6.0l convertible Jag has been garaged but
481 Satisfied Customers
I was wondering if you could help me with an issue with my
Jaguar Technician
16,763 Satisfied Customers
My 2000 jaguar xk8 will not hold a battery charge. After 2
481 Satisfied Customers
How it works
logoAsk for help, 24/7
Ask for help, 24/7
Members enjoy round-the-clock access to 12,000+ verified Experts, including doctors, lawyers, tech support, mechanics, vets, home repair pros, more.
logoExpert will respond in minutes
Expert will respond in minutes
After you reach out, we match you with an Expert who specializes in your situation. Talk, text, chat, whichever you prefer.
logoSave time & money
Save time & money
No scheduling hassles, missing time from work, or expensive consults.
A JustAnswer membership can save you significant time and money each month.
Sarahesq and 87 other Automotive Mechanics are ready to help you.
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.
Last Updated: 12-20-22
Why you’ll love JustAnswer
JustAnswer is the best way to get expertise on-demand from doctors, lawyers, vets, mechanics and more. Since 2003, we’ve helped more than 9 million people in 196 countries and have an A+ rating with BBB and a 9.6/10 rating with TrustPilot.
Highly rated, verified Experts
We pride ourselves in our 8-step verification process including license and credential checks. Vetted by us and rated by customers, like you.
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
Web sites like ...leave nothing to chance.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
JustAnswer, Professional Services  General, San Francisco, CA
Google reviews
TrustPilot Reviews