P38A 2.5 DSA Auto screeming to 4000rpm before changing gear !

Hi
A mate of mine out here in France has had a lovely 2001 year Range Rover P38 2.5 DSA Auto for over 5 trouble free years and the Auto box has just started playing up and wont change gear under 4000rpm !
He has changed the ECU under the seat, checked all sensors,even changed the Auto box for a know working second hand one and nothing has worked.
Box goes up and down all gears, but wont change up until min 4000rpm even when cold . There are no fault codes and this did'nt happen after a gearbox oil change !
Any help appreciated as it's a lovely vehicle but he has had enough and so far 3 garages can't find the fault !
Cheers

I seem to remember some others with this problem and it was the temperature sensor in the cylinder head.

Cheers mate ! I had heard about this !
Apparently it has been checked but not changed ! Got to be worth changing if they don't cost the earth !
can anybody add to this or got a part n° ?

Is the oil level bang on?
Where abouts un france are you?

Mark Piercy said:

Is the oil level bang on?
Where abouts un france are you?

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Em,Poitou Charentes

it is the green temp sender in the head between 4 and 5 cylinder not expensive change it .Nanacom will not pick up this fault .check connector as well make shure its got good contact with the termoinals

Mark Piercy said:

Is the oil level bang on?
Where abouts un france are you?

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Oil level in the gearbox ? Yes ! And the gearbox oil was changed along with the filter, and then the box was changed for another known runner with a 100k Km's to no availe.
We are in between Poitiers & Niort !

Yep. Engine temperature sensor. It does this on the diesel auto's when this sensor fails.

I have googled this problem and the sensor STC 2299 beyond believe and can't believe after all this vehicle has been through and had done to it could all be down to a sensor but at £7.99 has got to be worth a punt !
Anybody else had this same problem ?
Thank you all for your help ;-)

Jason2 said:

I have googled this problem and the sensor STC 2299 beyond believe and can't believe after all this vehicle has been through and had done to it could all be down to a sensor but at £7.99 has got to be worth a punt !
Anybody else had this same problem ?
Thank you all for your help ;-)

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Moral of the story, post on the forum first.

Totally agree matey

But one must do a minimum of reserch first before bother the likes of ;-) Just hope that's all it is !

Ridiculous, we know. I had a P38 come to me from another garage. It had 3 gearboxes replaced, Visits to two main dealers & a couple of independents before they brought it to me. They thought I was mad when I diagnosed a £7 part.

OverLander, The nanocom should pick up on this fault.

I had a faulty temp sensor on mine, stopped it staying in "torque lockup" when the temp gauge dropped a little before twelve o'clock. It was the head of the sensor being loose and fuzzy green.
We are 40mins north of Bordeaux.
Big area Poitou Charente..

Rick-the-Pick said:

Ridiculous, we know. I had a P38 come to me from another garage. It had 3 gearboxes replaced, Visits to two main dealers & a couple of independents before they brought it to me. They thought I was mad when I diagnosed a £7 part.

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Wow ! Unbelievable !!!

Sensor ordered so fingers crossed

A big thankyou is in order "Thankyou" , 5 months later, 3 different garages & one gearbox the problem has now been solved with a £7.99 sensor part N° STC2299 .
We now have a very HAPPY Range Rover P38 owner thanks to you geezers !
Have a good one

Glad it's sorted. This forum is brilliant!

Good one, shows what a good forum can do, don't forget to come here first in future. Martyn

Ffs ! Getting dissed off the newbies !

What are you on about ?'

I did cone here first ! As soon as I found out what problems this guy was happening which was last Saturday ! And if you look closely you will see that I have been a member since 2006 so telling me how good Landyzone is no new news to me matey ;-)