XF "DSC Not Available - Restricted Performance"

[ST150HB]

I've started this thread for future reference if anybody has this problem!

Lastnight I started the car and drove about 500m down the road before a message appeared saying "DSC Not available (or words to that effect) - Restricted Performance". I carried on, but there was no power available, capped between 30-40mph. I tried the old fashioned off and on technique, but no joy. Same message appears again this morning, however after I drop the OH at work, I tried the off/on method again and the message cleared - car drove fine.

Have the car booked in for a diagnostics check to see if there is an error. I have read many things online, ranging from duff turbos, EGR valve and battery problems.

Will keep this thread updated when I know more, as it might be useful in the future if another PHer has the same predicament!

ETA: Today is also the last day of the 3 month warranty from Stratstone! Cutting it fine!

[mike_e]

DSC is the dynamic stability control so is most likely to be something to do with restricting wheel spin / skid by restricting power and or braking the wheel(s). Could be a number of things e.g. wheel sensor, but if the message disappears then the detected fault has been cleared which points to an intermittent fault rather than something broken. Electrical connectors and wet conditions are good for this sort of issue. Fault codes should be logged even if the fault goes away.

[Colin RedGriff]

I had that message appear on my 2008 2.7D XF

Eventually traced to a faulty sensor for the electronic parking brake,but along the way also had to have several other components replaced

[jas xjr]

It might be as simple as a weak battery

[ST150HB]

UPDATE:

Albeit a very late update! I took the car to Roger Young in Saltash, they plugged it in to the diagnostics machine and took it for a test drive, and the conclusion was that the battery was the most likely culprit. A low voltage can result in spurious messages appearing, and that there was no cause for concern.

To be fair, the car has been fine ever since! Touch wood it will continue to be trouble free wafting for me.

[smtclaret]

I have had the same problem now for about 3 months on my 2008 xf with the dsc not working restricted performance warning coming on I ve had the brake sensor changed, something to do with the vacuum unit changed & oil & fuel filters changed so far cost me £5oo same thing is still happening. with this battery fault was the battery changed for a new one or just fully charged up ?

[8bit]

Weak/tired batteries can cause issues even for folks who keep them on conditioners. Jaguar should just change all the warning messages to say "... or battery needs changed" after them.

If it's an intermittent thing then my money will always be on the battery first, particularly if you don't do many miles, only ever do town driving/short distances, the battery is any more than about 3 or 4 years old or any combination of those factors.

[Fastdruid]

Not Jaguar specific but there are three types of error you'll get with (modern) cars. I'm not quite sure of the correct terminology and CBA to google for it but it boils down to
Permanent - It needs manual clearing.
Short term - It will clear in x number of cycles (where the cycles would be ign on/off).
One off - It will clear on the next cycle.

The reason for the short term is that the ECU will "upgrade" the warning to a permanent error if it re-occurs.

[ST150HB]

smtclaret said:

I have had the same problem now for about 3 months on my 2008 xf with the dsc not working restricted performance warning coming on I ve had the brake sensor changed, something to do with the vacuum unit changed & oil & fuel filters changed so far cost me £5oo same thing is still happening. with this battery fault was the battery changed for a new one or just fully charged up ?

Hi, apologies for the late response.

I had a new battery fitted and this cured the problem. The only electrical glitch I would have after the change was the service light flashing up even though it would have only been a 1000 or so miles after the service.

I no longer have the car, but the electrical niggles certainly did tarnish ownership--going into limp mode randomly on the dual carriageway wasn't confidence inspiring!

[threespins]

I have had the restricted performance indication on after only 2000 miles. The EGR valve was replaced under warranty. Hard to tell whether it had been changed or not looking at a newish engine. The dealer said it was sticking. Can't be due to mileage so hope it is just a one off and not a sign of things to come. ( MY first Jaguar)

[Shar2]

Just in case anyone is interested, I have had a problem with my XF 3.0D recently. On occassions the DSC failure warning would come on, sometimes followed by gearbox failure warning. Other times, in traffic, or when starting off, (happened on a roundabout, which was a bit embarrassing), the engine would just die, requiring me to brake, put it into park then turning it off and on again, after which the engine woul dbe fine and all the warnings gone. A week or so ago I was travelling down to Dorset and got the DSC/Gearbox warnings light up, just at the end of the Twyford Down cutting on the M3 where there are two lanes coming onto it. As I tried to get across from the outside lane the engine died, which meant no power steering. A bit of a brown trouser moment, but managed to wriggle my way through the traffic on momentum only before reaching the hard shoulder. Carried out the turning it off and on routine and all was well again for the whole weekend. Come Monday, whilst travelling to work, the engine died again, under the Tolworth underpass on the A3, (of all places). Restarted it and when I got to work phoned Jaguar. Got it booked in straight away to Guy Salmon Thames Ditton. The problem was the camshaft speed sensor and reluctor ring, which meant a full engine out repair. So, if you're are getting the DSC/Gearbox failure, it may not always be the battery, get it checked out.

[Orcadian]

I realise these problems are not confined to Jaguar cars only but manufacturers seem hell bent on fitting every gizmo available and developing others, just because they can. This restricted performance malarkey occurs in my 2000 Daimler Super V8 - a model which first appeared almost TWENTY years ago, if the battery is less than tip top. The designers of the architecture of these electronics need to get a grip on reality and as suggested before, have a message saying 'charge the bloody battery'
If they really want us to embrace this technology (driverless cars!!!) they'll have to up their game in preventing misleading messages appearing, often needing dealer diagnostics to sort out after a car has been sitting for a week. Dare you leave your late model Jag in an airport car park for 3 weeks while you jet away to the sun?
How many unnecessary parts and modules have been fitted to cars at the owners expense following these misleading messages?

That ad for a Moggy Minor starts to look interesting

Ian

[Jav123]

Just had both my EGR valves changed and the fault has gone common problem I believe was costly £1046 per valve from jaguar dealership.

My valves were in a pretty bad way so cleaning them wouldn't have solved anything had new ones the car is running fine now hopefully stays that way.

I've got a jaguar xf 2.7 diesel.

My advice is go to the dealership definitely had guys telling me wheel sensor, gearbox, battery all sorts but the guys at jag said EGR valve on both sides. At least a full diagnostics to see.

Fixed now so hopefully runs smoothly. Will keep you updated.

[Moses1995]

I had my own DSC come on immediately after changing the four tyres , I changed the tyres because there is always a vibrating noise when I’m matching the Gas pedal at about 50 to 60MPH , sometime lower , but at a very high speed it disappears. Now after changing the tyres the vibration is still there , and the DSC light came on , second day it disappeared, and about 3days later , it appeared and disappeared again . Really sucks