Question about 2001 Jaguar S-Type

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Transmission Fault message

I have a 2001 s type with 98,000 miles on it. About 2 days ago the check engine light came on and the car was very slow on take off. I took it to a mechanic and he scanned it, he told me that there's a missfire in cylinder 3&4, and that it needs a tune up, I got the tune up done but that didn't take care of the problem, right after the transmission fault message popped up on the dash and the trans won't shift to 4th gear, but when I turn the car of and turn it back on the messsage goes away, and comes back on in about 10 minutes, what seems to be the problem?

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CLICK HERE to see Taran_2005 solution is a direct cut and paste from Yahoo Answers. - NICE "EXPERT" Advice!?!

On to the real problem & solution....

Your car is going into limp-home mode.
Usually this fault is not a mechanical failure at all.
Be sure you are using High Octane fuel (without ethanol additives).
Check the gas station you last used, and i'm 99% positive they use 10% ethanol!
If you cannot find a PURE premium gas in your area, try an octane booster from the autoparts store.

Other times the ECU can be at fault - All computers crash. All software has bugs. As such, many ECU units are fitted with a 'limp home mode'. When it detects that something semi-serious is wrong, it enters the limp mode, which means that the engine won't rev beyond a pre-programmed speed, you can't accelerate very fast, or you may indeed be speed-restricted to 40 mph or similar. Bad? Well, no, not really: The alternative would be to either let you drive at regular speeds, with the danger of letting you trash your car (expensive repair, means happy repair people, but angry driver), or stopping you from going anywhere (expensive recovery and stranded on the side of the road means happy recovery company, but angry driver).

So while the ECU is telling the car there is a fault somewhere, try filling up with premium 100% gas next time, and see the result for yourself.

Thank you for using FixYa - A FixYa rating is appreciated!!

Posted on Jan 26, 2009

  • blueextc3221
    blueextc3221 Jan 26, 2009

    With a diagnostic code, we can better help if additional troubleshooting is required. Any parts store will hook up to a scantool free, and give you the code your ECU is spitting out.

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Yeah I Would Recommend Changing The Transmission Fluid And The Transmission Filter The Transmission Filter Will Reveal Any Metal Chunks Or Shaving That Will Reveal W either Or Not It Needs To Be Rebuilt.

Posted on Jan 26, 2009

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It may be in limp home mode... unhook the battery for about ten minutes and hook it back up... if the check engine light comes back on the issue wasn't fixed with a tuneup... have the codes scanned again

Robert

Posted on Jan 26, 2009

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Is the engine running fine or its still missing let me know thanks pierre

Posted on Jan 26, 2009

  • pierre laplante Jan 26, 2009

    for the trasmissiom to run good you need a good running engine

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Drain and replace transmission fluid and filter!

Posted on Jan 26, 2009

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I own a transmission shop, and the best advice anyone could give you is; Take it in to a reputable shop, and have the codes pulled to see what it means. 99% of the time there is a reason for this warning, and if you ignore it "just because it runs fine" is the most common mistake anyone could ever make. Since there are about 100 reasons for this, no one could answer this question, and they would only speculate if they did. You may only have a warning that signafies a need for the fluid & filter to be changed, but this is important due to the fact there is a pressure loss caused by the dirty filter. Letting it go will only cause problems. Either way; you need it serviced to deal with the warning, so doing it right the first time may save you big time in the long run.
Glad to help out, Good Luck!!!

Posted on Jan 26, 2009

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