The symptoms of what seems to be a transmission jerk occurs (almost like being rear ended) when in motion and when the car exceeds ~2.5K rpm. This used to send the car into restricted performance mode, switching the turbos off and the car slowly starts to loose speed and power. I could restart this easily by pulling over and restarting the engine. The restricted performance mode would bring up the following fault codes:
- P0046 - Turbo boost control solonoid - circuit range performance
- P004B - Turbo boost control solonoid B - circuit range performance
- P010F - MAF(or volume) sensor A/B correlation
Judging from these fault codes my first step was to get at the MAF sensors and give them a clean, one of them was particularly dirty. Since doing this, I am still experiencing the same symptoms, but the car does not enter restricted performance mode and the fault codes no longer appear.
My next step was to get the gearbox serviced. The automatic gearbox specialists changed the oil and sump, but they did not give the gearbox a reflash, like I have seen mentioned in a few other threads. Symptoms still remained after this.
My latest project, thinking that there was something amiss with the airflow, was to blank off the EGR valves. Symptoms still remain.
I continue throwing money at this car, my friends think I am insane and tell me to buy something like a new Ford Focus with a warranty. But I couldn't live with myself If I were to do that. So now I'm looking to the gearbox again, unless anyone can shed some light on this for me.
It gives you the latest software and a good gearbox man will set up the car on the road with a laptop to ensure you have a gearbox which operates within correct parameters. In my experience this action is mandatory. Properly set up, the ZF6HP26 is a brilliant gearbox. If it is out of limits, it can be very problematical.
See this well known link. "The Lurch".com details what other owners have experienced and offers some fixes.
https://www.google.co.uk/url?sa=t&rct=j ... 5232,d.d24
As regards the turbo fault codes, you need to get the car to a local independent Jaguar repair workshop where they will of seen these faults many times and know what is needed to get your car working properly again.
Where are you in the country? If you tell us that, we may be able to point you towards a well known and effective repair garage.
For all faults, there is a cause and an effect. Find the cause, fix it and the effect disappears.
Here is just one quote from someone I know on Facebook who allowed his specialist to use the wrong oil...
"Use the correct oil Lifeguard 6. I didn't and the box banged into gear. Changed it to Lifeguard 6 and all was well. 6 litres will come out when removing the sump leaving 3-4 in the torque converter and oil cooler. ZF say that is ok. I changed all 10 of mine using a transfusion machine."
S Type Forum Moderator
Pictures of my 2002 STR
I`ve written an article on the differences between an oil service, ie filter and Lifeguard oil and also defined the transfusion technique which is known as an oil change. Many do not know the difference. I`ll ask Nigel to bring that article up to the top of my pile and publish it as soon as possible.
ZF recommend 60k mile oil services at each 60k mile accumulation. The specialist I occasionally use tells me that is in his experience effective in keeping a gearbox in good condition.
Thanks for the reply. I am currently residing in the Wolverhampton area of the West Midlands, if you can recommend a reliable garage that can reflash my gearbox it would be very much appreciated.
I didn't realise the oil type would have such a huge impact on the gearbox performance. Unfortunately, I don't know what type of oil the mechanics used to refill it, but I think I may have to give them a call and query it after what you have mentioned.
Similarly a good accredited gearbox re-conditioner or a local independent Jaguar repair facility. Not being local to your area, I can`t personally advise. Google might turn up something near Wolverhampton.
I had mine done in 20012 and it cost £372.17 inc VAT just out of interest how much was you charged.
My oil service, ie new sump filter pan, cable connector sleeve, oil and reflash was carried out by Tom Lenthall in September 2015 for £340 plus VAT. I was happy enough with that and was able to sit with the laptop on my knees whilst Adam Price, the engineer took the car out on the road and coaxed the gearbox into its working parameters. An excellent job done.
We have a 2006 2.7 S Type which has recently started to bring up the "Gearbox Fault" warning, preceded by a noticeable clunk and then restricted performance...This can cleared by simply stopping and restarting the engine, but yesterday the problem occurred three times in a short journey, so clearly it is now time for action..
I changed the gearbox oil and pan myself about 12000 miles ago using the correct ZF oil, but did not get the 're-flash' done.
Is it likely this is causing a problem? the box has been fine until recently...
Can anyone recommend a reputable transmission specialist in the Hertfordshire area??
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