I have been having ALL sorts of issues with my 05 S Type R. A few months ago I had a new Throtle Body installed by the dealer. I had limp mode and all sorts of other codes come up. It drove fine for a short time. Then the same codes came back. I took it to the dealer once again. They said replace the transmission. I took it to AAMCO and they replaced everything(so they say). It still messes up. They took it to the dealer 3 times to have it programed. It did not work. Prior to it being taken back to the dealer the third time AAMCO said they found loose wires to the throtle body and hooked them back up. No luck. I have not had the car for almost 2 months now. Can anyone help me out here?

 

Welcome to the forum cmjrocks,

That's a serious amount of work with still no resolution!

I've copied your question from New Member Area - Intro a MUST to S-Type forum. Members here with the same model will be able to help.

Graham

 

Have there been any codes? Which & when (in terms of before/after/etc work done)?

 

I've just been chasing a vacuum leak after replacing my EGR valve ('04STR) - which incidentally was mis-fitted and thus also providing a nice vacuum leak! I found the oil filler cap had been cross-threaded at my local garage when it went in for an oil change recently. They are no longer my local garage.

One of the symptoms I'd got by the end of this little saga was the transmission going berserk. The hunting between gears became unbearable, the car was lurching about all over in 1st, and on the overrun or at v.low throttle and under 40mph it seemed to repeatedly want to select 2 gears at once with an almighty bang I can only describe as like hitting a speedbump at... er... speed. No codes, other than P0171 and P0174 (running lean). I found the vacuum leak at the oil cap, cleaned and reseated, reset the ECU, and that has solved all transmission issues for me. Drives like a new car now :-) Crazy how a little vac leak can cause so much havok. I suspect because the engine and gearbox must be very closely linked control-wise, so if the engine isn't at it's best it was reflected in the transmission. Perhaps the transmission couldn't cut the throttle properly for the gearchange, I don't know, but what I do know is screwing the filler cap in properly fixed it..!

 

2001 V8
We had a slipping problem at 10 years and 50k miles..Went to an independnt tranny garage here in Tustin, CA.
The problem was an idler shaft in the housing was just running in the plain aluminum tranny housing. It wore the holes over sized and allowed a oil pressure leak. They over bored the shaft holes and inserted bearings. Problem solved.Recommended tranny oil change every 25k miles.

 

Different transmission entirely.

 

Please start another thread. As JagV8 posted you have a different transmission and what you have has no relation to the question asked.
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I had limp mode issue and found water coming into the engine bay from the cowl and landing on top of the throttle body (TPS Sensor). Car dashboard lite up with engine systems fault, dsc not available, Park brake fault and had some ODB codes.

Fix - Clean the harness with electronic cleaner, electric tape on the harness and fixed the cowl leak... haven't had the issue come back.

Hope this help!

Here is a picture on the TPS harness with corrosion from the water.

 

Yeah... looks like some cowls leak after 5-10 years

 

Plus the big problem on the STR is the TPS plug points straight up so any fluid that lands on it or the wires going to it will go right into the plug. If there is any gap in the seal or the plug is not tightly made up you will get this connection wet.

The NA 4.2L has a much more standard setup with the TPS plug is horizontal and NOT vertical. I really think this is why the STR is so sensitive to washing the engine.
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Last Sat night when I was out in the STR it rained which we haven't seen much of in Perth for a long time. The car started ok but with the 3 error codes, engine systems fault, dsc not available, Park brake fault.

Some history on the car. Purchased Oct13, new battery, replaced TB and wiring harness was taped up last time I had water issues by the dealer.

I have read a thread here where a silicon bead was run across the firewall to deflect the water which seemed to work.

From what I have read here water / moisture seems to be an inherent problem in this area. Do any members know if a factory fix ever made available.

I have disconnected the battery and it still starts in limp mode.

Hoping this doesn't become a dry weather car only as it is an awesome car to drive.

 

No factory fix but sealing the conector so they are watertight helps. Some people have fashioned a water deflection sheild and others have applied an inverted V of silicone the length of the cowel under it, so the water runs off to the sides

 

There was a change to the TPS connector but it's not IMO a fix. The fix is to keep water off it, preferably by keeping it out of the engine bay. Every sensor and harness connector hates water and there are many in the engine bay.

 

My dealer has had 2 attempts at fixing this no drive when it raining problem. First was to tape the wiring harness and just recently when I was stranded cleared a drain in the wiper cowl which he said was causing the problem however, I still can't take the car out if it's raining.

I have just found this SB S159 issue by Jaguar which may help in solving this problem. Have pasted the post below if any one else is having this problem. Apologies as I don't know how to link it.

FactoryJaguarTech
RE: Really Serious Problems With a S-Type R
Its not crazy just another example of techs not reading their tsb.
The tsb is for a patch to be installed under the cowl to prevent water ingress to tps as genius said.
What is the last six of your vin? I will tell you if it has been done.
It is a service action S159:

Issue:
A concern has been identified on 2003-04 MY S-TYPE R vehicles within the above VIN
range. It is possible that during washing of the vehicle, by car wash or jet wash, the
water can run through the cowl panel grille-fixing hole into the throttle position sensor
housing. This can result in the throttle position sensor failing to function, the engine
management system defaults to ‘limp home’ mode, and a warning MIL is displayed.
A sealing patch is available to prevent water flowing directly from the cowl panel grille
onto the throttle position sensor.
Action:
On 2003-04 MY S-TYPE R vehicles within the above VIN range, install a sealing patch
on the mounting hole located on the suspension turret cross brace at the bracket
securing it to the bulkhead.
WORKSHOP PROCEDURE
1. Open door and hood and install fender protection kit.
2. Remove cowl panel grille, see Workshop Manual, JTIS CD ROM, section: 501-02,
SRO 76.10.01.
Page 2 of 3 Bulletin Number S303-S159 Date of issue 11/03
3. Clean the area indicated on the bracket of the suspension turret cross brace where
it secures to the bulkhead (Illustration 1).
4. Ensure the plastic insert is central in the rectangular hole of the brace.
5. Remove and discard the backing from the adhesive patch and install the patch
centrally over the right hand rearmost rectangular hole (Illustration 1) of the
suspension turret cross brace.
6. Reinstall the cowl panel grille, see Workshop Manual, JTIS CD ROM, section: 501-
02, SRO 76.10.01.
7. Remove fender protection kit and close hood and door.


Parts Information:
DESCRIPTION PART NUMBER QTY
XR8 31093 Sealing Patch 1

Date of issue 11/03 Bulletin Number S303-S159 Page 3 of 3

Service Action S159
Model VIN Range:
2003 MY S-TYPE R 31M45255 - 31M94764
2004 MY S-TYPE R 41M94765 - 41M95025
__________________
If it ain't broke, don't fix it!!!

 

If yours hasn't been done already then it's most odd. Besides, the dealer should have done it by now too!

 

Yes that TSB is to cover the mounting hole or holes with round pieces of black Duct tape.

They go in the red box below. This car has not had them installed.



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