Hi,
Have owned an XF for 2 years now, the 2012 model.  In the last month the car has stalled on 5 occasions!! Blind panic as its an automatic and always happens whilst stationary at a busy roundabout!!  I sent the car to Farnell Jaguar in Leeds who advised that the battery was not holding charge and instructed them to replace it thinking this must be the cause. Had the car back for a week and its stalled again this morning.  The car starts fine but when I slow to a stop within the first few miles it sounds and feels like my first car with a manual choke.  Has anyone else had this? Jaguar have said there is no fault code and as the problem is intermittent their tech team say it is difficult to identify and  resolve
Many thanks
Mark

Hi Mark, it sound to me, and I don't know for sure, but it could be a fuel filter problem, I'm only guessing of course. Have you run the car ''low'' on fuel at all at anytime?? When I say low, I mean, only around 50 - 70 mile range left in the tank?? If you have, its possible debris might have been dragged into the fuel filter and clogged it, hence the poor idle and stalling ....... but its only a guess on my part.  Hope this might help?? 

Phosphor Blue  ( Aka Malc )

Welcome to the club, Mark.

I also think its is a fuel problem. I am assuming your car is a diesel, and if so do you use Premium fuel?  I find it gives better fuel consumption, as well as being a cleaner fuel.

I would be inclined to pit in an additive, Diesel Magic costs under a tenner and will give the fuel system a good clean out.

Let us know how you get on.

Regards,

Peter.

 

 

 

 

 

2 hours ago, Old Peter said:

Welcome to the club, Mark.

I also think its is a fuel problem. I am assuming your car is a diesel, and if so do you use Premium fuel?  I find it gives better fuel consumption, as well as being a cleaner fuel.

I would be inclined to pit in an additive, Diesel Magic costs under a tenner and will give the fuel system a good clean out.

Let us know how you get on.

Regards,

Peter.

 

Thanks Peter.  I will pop down to Halfords on my way home and buy some additive.  It is a diesel, incidentally this last time it stalled it disabled the stop/start facility.  The fault has cleared again once I re started the car.  Maybe this could mean an electrical fault  ?

Thanks 

Mark

 

 

 

 

Hi Mark, 

You fid mention that the battery had been changed.  There batter is my S Type needed caging after 4 years and 11 months, and some of the electrical niggles it had suddenly disappeared. A weakening battery is know to be very fickle!

Regards,

Peter.

It could possibly be the auxiliary battery dropping below 50% charge if the problem is related to the stop /start?..Changing the main battery will not charge the small battery as its charged independent so if your doing a lot of town driving and using stop / start  the auxiliary won't recharge until taken on a long run. Also the auxiliary battery converter module can become troublesome on the XF.

Hi

Don't know much about the XF but its a common problem on most modern cars and can usually be the throttle body thats dirty or even MAF dirty

MAF usually easy access but throttle body can be in awkward places on modern cars

Throttle body on modern cars is fly by wire, so mechanical link between pedal and engine

cheers

Joe

Hi Mark,

Did you ever get to the bottom of this?  I am having the same problem with my 2012 XF.

Thanks,

Mark

Hi guys. Any update on this? I’m having the same problem. 2012 2.2

Hi! Any updates on this? Another 2.2 2012 here. same problem! My car didn’t show any fault codes on my Carista obd2, but throws codes on proper units. My codes are P0942-62 transmission Hydraulic pressure unit / signal compare failure AND U0415 Invalid data revived from control module. Suspected torque converter or transmission... 😞

I’m having intermittent acceleration power loss (especially dangerous at roundabouts) and jerking when coming to a slow stop. 

There is days when the car drives absolutely fine and then there is days when it try’s to kill me... 

have been to a ZF specialists and after a fluid check and shirt spin they couldn’t get their heads around... going to see different garage tomorrow and if I will have any updates will post them here.

cheers

Gatis

After just having a Service & MOT.  I have booked my car in for a check on the 21/08/19.  I will post an update the following day.

Mark, have you been having these issues for two years now and haven’t managed to get it sorted?

No I have been having the problem for about a month.  The original post is from a different Mark.

Ha ha got it! Well let’s get to the bottom of this. What mileage you on? Have you done transmission service? I did a month ago. At 100k. Cleaned the EGR, took four a 50mile ride in 7th gear at 70mph to get the DPF cleared. I never had any dashboard warnings nor codes coming up on my obd2. Using shell V-Power 85% of the time. Shell helix professional oils... service done every 10k... and now she does me like that.

I will check with the garage on Wednesday to see what they did for the service & I will mention your comments about the EGR valve.  I am currently on about 50k mileage.  Thanks for your advice and I will post an update after the garage has taken a look.

The garage could not find any error codes.  However they found that the Exhaust gas recirculation (EGR) valve requires initialisation.

They did this and the car does feel to be running smoother unless it is my imagination.  I will post another update in a month.

Hi Mark,

I have never heard the term "initialisation" applied to EGR valves, although they can get sticky.

I always use Millers Diesel Eco  plus additive to keep them clean.

I had to replace both EGR valves a few months ago  --  my s type V6 2.7 diesels two.  Not a problem since.

Regards,

Peter.

So far so good.

Hows things folks,

I recently bought an xf rsport 2014 2.2auto 163 ps

I have just had the fuel pump replaced through the warranty the car seemed to be driving fine when I collected it yesterday.

Then today when driving from a stop the car would not accelerate I mean my foot was on the floor and the car crawled up to about 30kph and wouldnt go passed 3000 revs even manually going up through the gears.

Anyone any idea on what it could be? 

Many thanks  

Having a similar problem with my XF I bought about a month ago, did you ever get to the bottom of this?

My 2009 XF premium luxury stalls after it's warmed up when I try to take off from a stop.

Hi everyone,

P0942 hydraulic presure unit - any idea?

Jaguar 2.2d 2012 transmission 8hp zf

Just now, George87 said:

Hi everyone,

P0942 hydraulic presure unit - any idea?

Jaguar 2.2d 2012 transmission 8hp zf

 

On 8/14/2019 at 12:24 AM, Gatis said:

Hi! Any updates on this? Another 2.2 2012 here. same problem! My car didn’t show any fault codes on my Carista obd2, but throws codes on proper units. My codes are P0942-62 transmission Hydraulic pressure unit / signal compare failure AND U0415 Invalid data revived from control module. Suspected torque converter or transmission... 😞

I’m having intermittent acceleration power loss (especially dangerous at roundabouts) and jerking when coming to a slow stop. 

There is days when the car drives absolutely fine and then there is days when it try’s to kill me... 

have been to a ZF specialists and after a fluid check and shirt spin they couldn’t get their heads around... going to see different garage tomorrow and if I will have any updates will post them here.

cheers

Gatis

Hi Gatis, 

How did you fixed the problem with transmision, I have the same error P0942

Hi guys! Did you manage to get sorted the P0942(62) code? My car wont start and there is no message on display. Thanks