Hi
I bought a used 2010 XF 3.0 Diesel three months ago from a dealer with 41K on the clock. I do not drive it much.
One month ago I incurred a "Restricted Performance" warning on the Freeway when attempting to accelerate quickly. The car was full with five adults and it had driven through an hour of heavy traffic through the city longest drive yet in this car.
I took it to my own mechanic first to read the codes, before I took it back to Jaguar Service Centre under dealer used car warranty.
The code was "P1247 - Turbocharger Boost Pressure Low".
Jaguar Service called and told me that they are changing a valve in the Turbocharger at the time and they had my car for three days. Did not give me a report on what was done.
I got the vehicle back two weeks ago and did not drive it much as usual. Two days ago when I came back from a very short trip at the shops I got a "DPF Full See Handbook" warning amber colour. After reading some threads I decided to take it on the freeway that evening for an extended drive to clean out the DPF.
I put the car in S mode and drove in 4th gear at 110Km/H to keep the revs up around 3000rpm. The code disappeared after 10 minutes. I drove for a good half an hour. When I got off the Freeway to turn around and head back home the "Restricted Performance" warning came on again when I accelerated harder to get on the return freeway. I pulled over turned car off and cleared the limp mode. Drove back for another half hour in S mode and similar revs. Restricted Performance came on again. It seems to be doing it when the engine gets hot and when accelerating hard.
I have it booked in to Jaguar Service this Monday. However, I got my mechanic to read the codes again before I take it in.
The two codes I had were:
1. "P2459 - Diesel Particulate Filter Regeneration Frequency".
2. "P1247 - Turbocharger Boost Pressure Low".
I will be getting a report before I hand my vehicle over to them again.

Will be keeping you posted.

 

On the 2.7D S-Type those would be huge warnings not to drive it until a check the engine oil hasn't got diesel in it due to failed regens, because soon after that engine destruction is quite likely.

 

Hi JagV8,
That is quite worrying. I will make sure I get them to check for Diesel in the oil. What I'm not sure of is whether the Restricted Performance error I am getting is related to the DPF regeneration or coincidental.

 

When you have DPF problems and warnings, the orange warning does not trigger RP mode but the red warning does. But pretty much any turbo problem will trigger RP.
However a blocked DPF can effect turbo operation and a faulty turbo can effect DPF operation, so I would get both looked at asap.

 

Hi OzXFR,
Thank you for your input. Its booked in tomorrow for another attempt by Jaguar.
Ash

 

OK
I got my car back from Jag Service and here is the verdict. My DPF was blocked with 40 grams of soot. They cleaned it out and told me after this procedure the reading came down to 3-4 grams. I'm not sure what that entails as they did not explain to me how they clean it out and how they measure. Anyhow, I will be taking the car out for another extended drive to make sure the warnings don't come back.
Cheerio

 

Restricted Performance Back. After I wrote the last thread I took the car for a drive on the freeway. 20 minutes into the drive the dreaded Restricted Performance warning popped up again. I was not accelerating but cruising in 4th gear at about 100km/H and 2500RPM. I have lost confidence in the vehicle and one of only a handful of Jaguar Service Centres in Sydney as the issue does not seem to have been diagnosed correctly. It seems that ancillary errors with DPF are as a result of the root cause, which is alluding Jaguar Service.
I wonder what my options are?

 

The saga continues. I took the car back a third time within a month for the recurring Restricted Performance issue. The authorised Jaguar centre kept my car an entire week without giving me a courtesy car. They had one of their mechanics drive my car back and forth to work. Gave my car back without a report and only said they cannot fault the car. Also noticed they half emptied my full tank of petrol again. I drove the car the first chance I got after a day and the Restricted Performance came back on the freeway after 15 minutes.
I am not going back a forth time and wasting my time. Does anyone know a Jaguar specialist in Sydney that can diagnose my issue. I had called Jaguar Australia but they were not much help and asked me to take it back to the same authorised service centre. Any help would greatly be appreciated.

 

Ask @Cambo for help

 

Hi 08292,
I don't understand what you mean by @Cambo. Please clarify as my search for Cambo did not yield any results.
Thanks
Ash

 

Cambo is one of the moderators who lives in Australia. Look up his profile and contact him directly.

 

Also consider contacting the forum member "Nessie" (real name Jon) on the jaginfo.org forum.
He lives in the Blue Mountains a bit west of Sydney, he also has a 3.0 diesel XF, and he has a lot of contacts in the trade.

 

Thank you for your replies and suggestions. Will be contacting them.

 

Hey Ash, I've sent you my number in a private message. Cheers, Cameron.

 

Drove car to Jaguar service centre for fourth time this morning for the yet to be diagnosed Restricted Performance (Turbo Boost Pressure Low) error. On the way there the DPF Full error came back again, despite it being cleaned by them 250KM ago. Now I'm no mechanic but this seems to suggest to me that there is an issue with the combustion and the fact that I'm only getting about 450KM per full tank of diesel, it means the fuel is not combusting properly and creating a lot of soot.
Also report from last visit - they carried out Air path routine using SDD/IDS to calibrate EGR and they did Dynamic test and extensive road test.

 

This is beyond ridiculous. I got the car back after another week of Jaguar service centre attempting to repair the Restricted Performance and DPF full errors which keep popping up. This fourth visit they told me they changed a Turbo Solenoid and a couple of air gaskets. Yet to receive a full report.
Straight after getting the car back today, I took it on the freeway and the Restricted Performance came back less than 3KM on the freeway. I'm certain now that it happens on steep inclines and in S mode. I was not pushing the car as I was still warming it up.
I just wrote an email to the dealership requesting a refund as I'm not taking it back a fifth time. Grrrrr

 

The vehicle has gone back to the Jaguar Service Centre an amazing Fifth time for the same recurring Restricted Performance. I had the code read by my own mechanic before I handed the car over to them. It is the same code P1247.
The service manager told me that there are 14 conditions that can trip this code. They are somehow trying to suggest that each time it is a new issue. Logic dictates that they just have not diagnosed the real issue because the fault is happening under the same driving conditions and immediately after I pick it up from them.
Anyhow, I have asked them for a refund and will not accept taking the car back. I just wanted them to have the opportunity to diagnose the issue. Will keep you posted of the outcome.

 

On the 2.7 diesel there is a hose (or hoses) that runs to the DPF, a forum member some years ago was chasing his tail, similar problems like these, nobody could figure it out, turns out there was a split in this hose that runs to the DPF, changed the hose, problem solved.

Not sure if it's the same on the 3.0 but something worth checking.

If that hose uses boosted air from a turbo to blow into the DPF as part of the DPF operation, then that might explain why you have problems/codes relating to both.

It was some years ago since I read this, so I may be wrong, I'll see if I can find the thread, it was on a UK-based Jaguar forum.

 

At least four threads on jaginfo.org about this error code and other related problems.
Most common cause appears to be a split intercooler housing or pipe, but there are other causes.

See here: Jaguar XF Restricted Performance - HELP!

Could these faults all be caused by DPF blockage?

P1247 fault code help please.

P0088 Fuel Rail/System Pressure Too High Fault

 

Thank you Cambo and OzXFR for your replies and information.
I just got a call from the Dealer and they have decided to refund the monies for the vehicle. I may never find out what the outcome of the diagnosis would be. I will post if I get an update.
It was a bit disappointing that Jaguar Australia did not come to the party and assist. This is obviously an issue which many people suffer from. Fair enough that they may not want to admit liability, but at least they can support their agents more to diagnose the issue and get a speedy resolve.
Anyhow thanks to you all.
Ash